Snap hooks and clasps connect a strap or cord to a ring, D-ring, or bag body. On 3DANsupplies, product titles often name the eye shape (D-eye, round eye, square, oval, trapezoid) and whether the clasp swivels. Matching eye shape and width to your webbing or cord keeps the strap from binding or sitting crooked on the ring.
This guide covers eye styles in the catalog, swivel vs fixed clasps, gate types at a high level, and related end fittings. Browse the full range in Snap Hooks & Connectors.
What the eye is
The eye is the fixed loop or opening on the clasp that attaches to your strap hardware—not the gate that opens onto a D-ring or bag loop. You sew, rivet, or clamp the strap end through that eye, or you pass a ring through it.
Eye size on listings is usually the opening width that must clear your webbing or ring. Titles often list inch and metric sizes (for example, 3/4" with a centimeter length). Treat eye width as the fit check; overall clasp length is secondary until the strap passes cleanly.
Common eye shapes in this catalog
Titles in Snap Hooks & Connectors name eye shapes as they appear on the part:
- D-eye — D-shaped opening; common on push-gate and trigger swivel snap hooks (for example, D-eye push-gate hooks in 1/2" and 3/4" sizes).
- Round eye — circular opening; appears on push-gate clasps, bolt snaps, and some trigger hooks (for example, round-eye clasps in 3/8", 1/2", 5/8", and 3/4").
- Square eye — square or near-square opening; listed on fixed (non-swivel) push-gate hooks and some swivel styles.
- Oval eye — elongated oval; used on some square-top push-gate and flat-gate clasps.
- Trapezoid eye — wider flat bar on one side; listed on some push-gate and bolt-snap styles (for example, 1" and 1 1/4" trapezoid-eye hooks).
Flat D-eye means the D opening is flattened for a wider strap face. Round eyes suit cord and round rings; D, square, oval, and trapezoid eyes often seat flat webbing more evenly.
Swivel vs fixed (non-swivel) clasps
Swivel clasps rotate at the joint between the eye and the gate body. They reduce strap twist on crossbody or shoulder wear. Most push-gate and trigger snap hooks in this collection are swivel styles.
Fixed or non-swivel clasps do not rotate. Titles may say Fixed (Non-Swivel) or Non-Swivel. Use them when the strap should stay flat—for example, a short handle tab—or when a pattern calls for a non-swivel hook.
Prefer swivel when twist resistance matters; prefer non-swivel when orientation must stay locked, and confirm eye direction in the product photos.
Gate types at a high level
Gate type is separate from eye shape. Read the title for how the clasp opens:
- Push-gate — spring gate you push open with a thumb or finger; common on swivel snap hooks in this catalog.
- Bolt snap — sliding bolt or plunger-style gate; often listed with round, D, or trapezoid eyes.
- Trigger / lobster-claw — lever trigger that opens the claw; listed under trigger and lobster-claw hooks, including long and double-end styles.
Product titles name the gate and eye together (for example, Push-Gate Swivel Snap Hook, D Eye). Do not infer load ratings from the name; use the size your pattern needs, and check photos for gate clearance on your ring thickness.
Matching eye opening to strap width and rings
The eye must clear the strap width with room to sew or fold. As a practical rule: eye width ≥ strap width, with clearance for stitching or a folded end. A 1" webbing strap needs an eye that accepts 1" material; a 3/4" eye fits 3/4" webbing better than a full 1" strap.
Also match the gate to the ring or slider it clips onto. Browse Rings, Buckles & Sliders for D-rings and rectangle rings in the same width family. Confirm the gate clears the ring wire or bar thickness on the product page.
For webbing by the yard, check widths in Webbing & Cord before you pick a hook size. Ready-made straps and chains are in Straps & Chains if you are replacing a finished strap.
Finish matching
Finishes in this catalog include nickel, antique brass, antique bronze, antique copper, gold, chrome, and specialty colors such as rainbow on some styles. Match the clasp to nearby D-rings, buckles, and bag feet when they share the same view.
If you cannot match exactly, keep one color family (all nickel-tone or all antique brass-tone) rather than mixing bright gold with antique bronze on one strap. The same eye style often ships in more than one finish as separate listings or options.
Cord and rope: round-eye and rope end caps
Round eyes suit round cord and rope better than wide flat webbing. This collection also lists rope end caps—with a U-loop, round ring, or chain and clasp—plus mini lobster-claw and hex-loop cord end caps for smaller diameters.
Choose the end fitting for the cord diameter first (see the product page), then match finish to the rest of the bag. For flat webbing, prefer a D, square, oval, or trapezoid eye sized to the strap width instead of forcing wide webbing through a small round eye.
Ribbon and webbing ends: crimp clamps
Ribbon end crimp clamps (with or without a loop) are an alternative to sewing through a snap-hook eye. You crimp the clamp onto the ribbon or webbing end; styles with a loop then connect to a ring or clasp.
Use crimp clamps for thin ribbon or a finished metal end without a sewn eye. Use a sewn or riveted pass-through on a snap-hook eye for heavy webbing when the pattern expects a classic clasp. Both types are in Snap Hooks & Connectors; pick by material thickness and whether you need a loop.
Shop path
Open Snap Hooks & Connectors. Filter or scan titles for eye style (D-eye, round, square, oval, trapezoid) and size. Note swivel vs fixed and gate type (push-gate, bolt snap, trigger). Match finish to your other hardware. Then confirm strap or cord width in Webbing & Cord and rings or sliders in Rings, Buckles & Sliders.
Shop next
Ready to pick a clasp? Browse Snap Hooks & Connectors for D-eye, round-eye, square, oval, and trapezoid styles. Pair them with Rings, Buckles & Sliders, Webbing & Cord, or Straps & Chains once eye width and finish are set.