Tianbang Plastic Black 1.25" Inside Diameter D Ring Lobster Clasp Claw Swivel for Strap Pack of 6 Swivel tail D ring inside diameter:1.25". Lobster clasp total Length:2.3". Snap opening mouth maximum size about:0.24". Lobster all kinds of purse or bag strap connector. Full 360 degree swivel eye helps prevent tangles.