Tianbang Bronze 0.6" Inside Diameter D Ring Lobster Clasp Claw Swivel for Strap Pack of 15 Swivel tail D ring inside diameter:0.6". Lobster clasp total Length:1.5". Snap opening mouth maximum size about:0.28". Lobster all kinds of purse or bag strap connector. Full 360 degree swivel eye helps prevent tangles.