What Is a Cord Lock or Drawstring Stopper?
A cord lock or drawstring stopper is an adjustable component used to control the movement of a cord, lace, string or compatible round elastic. Pressing the operating button releases or aligns the cord passage. The cord can then be moved to the required position. Releasing the button allows the mechanism to apply pressure and help retain the selected adjustment.
Cord locks provide fast, reusable adjustment on hood openings, waist drawstrings, bag closures, footwear lacing systems, headwear and other gathered textile products.
A cord lock does not finish the cut end of a drawstring. Use cord ends and drawstring tips for the terminal sections. Both component types may be used together on one cord assembly.
Which Cord Lock Should Be Selected?
| Application Requirement | Model to Consider | Specification to Check |
|---|
| Adjust one cord through one passage | Single-hole cord lock | Actual and compressed cord diameter |
| Keep two ends in separate passages | Double-hole cord lock | Internal size and direction of each passage |
| Adjust two ends with one movement | Single-button double-hole cord lock | Compatibility of both passages with the selected cord |
| Use the component on lightweight garments or bags | Plastic cord lock | Body weight, colour and fabric contact |
| Create a visible metal hardware detail | Zinc-alloy cord lock | Finish, weight, outside size and cord compatibility |
| Use a flat or oval drawstring | Rectangular-entry cord lock | Drawstring width and thickness |
| Create a compact appearance | Small, semicircular, oval, crescent or mine-shaped model | Outside body size and operating comfort |
| Use a long and slim component | Elongated or flat cord lock | Installed direction, cord route and button access |
E-Buttons Cord-Lock Categories
Metal Cord Locks
Metal cord locks are zinc-alloy components available in single-hole, double-hole, round, oval, flat, small, elongated, cube and other decorative body forms.
Metal cord locks may be selected where the adjusting component is intended to remain visible as part of the design. Component weight and surface contact should be tested on fine fabrics, lightweight hoods and delicate products.
Plastic Cord Locks
Plastic cord locks are lightweight adjusters made from plastic or acetal, depending on the model. Single- and double-hole, round, flat, elongated, crescent, mine-shaped and model-specific structures are available.
A plastic body does not prove that the internal spring, colour treatment or complete component is suitable for every washing temperature or outdoor environment.
Single-Hole and Double-Hole Cord Locks
A single-hole cord lock provides one shared passage and is normally used with one cord. Two fine ends may be used together only where their combined compressed dimensions remain compatible with the channel.
A double-hole cord lock keeps two cord ends in separate passages. This arrangement can help maintain parallel routing on hood, waistband and bag applications.
A double-hole model is not automatically stronger than a single-hole model. Holding performance depends on cord size, surface friction, spring pressure and internal passage geometry.
| Cord-Lock Structure | Cord Arrangement | Selection Note |
|---|
| Single hole | One shared passage | For one cord or compatible fine ends using one route |
| Double hole | Two independent passages | For keeping two ends separate and parallel |
| Single-button double hole | Both passages are released by one button | For adjusting both ends simultaneously |
| Bridge or side-operated model | Cord and operating direction vary by design | Button access and operating comfort must be tested after installation |
Top-Push and Side-Operated Models
On a top-push cord lock, the operating button is located on the upper part of the body. Pressing it aligns or releases the internal passages so that the cord can move.
On a side-operated or bridge model, the operating direction and cord route depend on the body construction. Check the installed orientation, access to the button and whether the cord can move without excessive bending.
How Does a Cord Lock Hold the Cord?
On a spring-loaded cord lock, the cord passes through openings in the body and moving button. Releasing the button moves the openings away from full alignment, pressing the cord between internal surfaces and restricting movement.
Holding performance depends on:
- Actual cord thickness relative to the passage
- Cord surface friction
- Soft, filled, rigid or elastic cord construction
- Spring pressure and button travel
- Round or rectangular internal geometry
- Direction and level of applied pulling force
How to Measure Cord Compatibility
The opening stated in a product title is the nominal internal passage. It does not guarantee compatibility with every cord carrying the same stated diameter.
| Measurement | Why It Matters | How to Check It |
|---|
| Outside round-cord diameter | Determines whether the cord can pass through the channel. | Measure several points with a caliper without flattening the cord. |
| Lightly compressed diameter | Shows how much a soft cord narrows under spring pressure. | Record it together with the normal measurement. |
| Flat-drawstring width | Must correspond with the horizontal size of a rectangular channel. | Measure the widest section. |
| Flat-drawstring thickness | Affects channel height and complete mechanism closure. | Measure any folded or joined section separately. |
| Cord surface | A very smooth surface may slip after locking. | Complete a pull test in the actual operating direction. |
| Cord rigidity | A rigid cord may prevent complete button closure. | Confirm free button movement with the cord installed. |
Common Cord-Entry Groups
Imperial values below are approximate reference conversions. Use the verified individual product measurements for final selection.
| Cord Entry | General Application | Compatibility Check |
|---|
| 3–3.5 mm / 0.12–0.14 in | Fine cords and small accessories | Confirm sufficient friction after locking. |
| 4–4.5 mm / 0.16–0.18 in | Hood cords, garments and lightweight bags | Check braid density, surface and compressed diameter. |
| 5–5.5 mm / 0.20–0.22 in | Hoodies, tracksuits and medium-weight bag cords | Confirm that the cord does not slip after locking. |
| 6–7 mm / 0.24–0.28 in | Thicker laces, filled cords and selected round elastic | Confirm that cord rigidity does not overload the button. |
| Round entries up to 9 mm / 0.35 in | Thick cords and model-specific applications | Evaluate body scale and holding performance together. |
| 6 × 3 mm / 0.24 × 0.12 in, 6 × 3.5 mm / 0.24 × 0.14 in and 7 × 3 mm / 0.28 × 0.12 in | Fine flat or oval drawstrings | Measure width and thickness separately. |
| 8 × 4 mm / 0.31 × 0.16 in, 8 × 4.5 mm / 0.31 × 0.18 in and 10 × 3.5 mm / 0.39 × 0.14 in | Wider flat drawstrings and compatible narrow elastic | Confirm free movement and secure locking. |
This table is a general selection guide and does not guarantee compatibility. Manufacturing tolerance, braid structure, filling and cord surface may change the result.
Metal and Plastic Cord Locks Compared
| Feature | Metal Cord Lock | Plastic Cord Lock |
|---|
| Verified material group | Zinc alloy | Plastic or acetal |
| Weight | May create a heavier and more visible hardware detail. | Adds less weight to lightweight textiles. |
| Appearance | Nickel, black nickel, gold, antique brass, gunmetal and painted options may be available. | Black, white, navy, orange, red, yellow, purple and transparent options may be available. |
| Primary selection reason | Metal appearance and coordination with other hardware | Low weight, colour coordination and practical operation |
| Fine-fabric check | Weight and metal-surface contact should be tested. | Mould lines, edges and body contact should be checked. |
A plated zinc-alloy cord lock is not automatically stainless or suitable for saltwater exposure. A plastic body also does not prove that the internal spring and other parts are plastic.
Real-World Applications
- Hoodie, coat and jacket adjustment cords
- Tracksuit, shorts and sportswear waist drawstrings
- Bag, backpack, pouch and drawstring-sack closures
- Shoe, boot and trainer laces
- Adjustment cords on hats, headwear and neck warmers
- Sleeping bags and compatible camping textiles
- Curtain, cover and home-textile gathering systems
- Adjustment points using compatible round elastic
Not every model is suitable for every application. Final approval must be based on the verified dimensions, material, colour, body structure and mechanism information on the individual product page.
How Is a Cord Lock Installed?
- Measure the normal and lightly compressed cord dimensions.
- Press the operating button to align the passages.
- Thread the cord through the correct passage.
- On a double-hole model, place the two ends in separate channels.
- Release the button so that the mechanism engages the cord.
- Pull in the actual operating direction to test slipping.
- Fit any terminal cord ends after completing the cord route.
Standard spring-loaded cord locks are normally installed by hand and do not require a press or setting die. A separate tool may be required for the terminal cord end.
Incorrect Selection and Use Warnings
- A cord that is too narrow may slip after locking.
- A cord that is too thick may not pass through or may prevent complete button closure.
- Measure both width and thickness when using a flat drawstring.
- Check the compressed diameter of soft and filled cords.
- A very smooth cord may slip despite having a suitable nominal size.
- The number of holes does not determine holding strength by itself.
- A heavy metal cord lock may pull or distort lightweight fabric.
- A fitted cord end may not pass through a cord-lock channel or eyelet.
- Metal or plastic appearance alone does not confirm wash or outdoor suitability.
- Small-part and detachment risks must be assessed separately for children’s products.
- Complete a sample test with the actual cord before wholesale ordering or mass production.
Related E-Buttons Categories
Frequently Asked Questions About Cord Locks
What does a cord lock or drawstring stopper do?
A cord lock helps adjust the usable length or gathering of a cord and retain it at the selected position.
How do I select the correct cord-lock size?
Measure the outside and lightly compressed diameter of round cord. For flat drawstrings, measure width and thickness separately and compare them with the verified passage.
Is matching the nominal cord and opening size sufficient?
No. Braid density, filler hardness, surface friction and compressibility can change the actual holding performance.
What is the difference between single-hole and double-hole cord locks?
A single-hole model has one shared passage. A double-hole model keeps two cord ends in separate passages. The number of holes does not determine holding strength by itself.
Why does the cord slip through the lock?
The cord may be too narrow, too smooth or too rigid for the selected mechanism. Passage geometry and spring pressure also affect compatibility.
Does a cord lock require a press or setting die?
Standard push-button cord locks are normally installed by hand. Press the button, align the passage and thread the cord through it. A separate tool may be needed for a terminal cord end.
Can a cord lock be used with round elastic?
It may be used when the entry and mechanism are compatible. Because elastic changes diameter under compression and tension, test it with the actual material.
Should I choose a metal or plastic cord lock?
Choose plastic where low weight and colour coordination are priorities. Consider zinc alloy where a visible metal hardware detail is required.
Should the cord lock or cord end be installed first?
If the completed cord end is larger than the lock passage, thread the cord lock first and fit the cord end after completing the cord route.
Are all metal cord locks stainless?
No. The E-Buttons metal cord-lock category consists of zinc-alloy models. Verify the exact finish and intended conditions of use on the individual product page.
Is sample testing required before wholesale production?
Yes. A sample confirms cord passage, holding performance, button movement, component weight, colour and appearance on the finished product.
Last updated: 21 July 2026
Business and brand: E-Buttons – Istanbul, Türkiye
Technical verification note: Refer to the individual product page for exact metric and imperial entry dimensions, outside body size, material, finish, colour, pack quantity and mechanism structure.
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