Tianbang Black 1.25" Inside Dia D Ring Lobster Clasp Claw Swivel Eye Hole for Strap Pack of 5 Swivel tail D ring inside diameter:1.25". Lobster clasp total Length:2.4". Snap opening mouth maximum size about:0.2". Lobster all kinds of purse or bag strap connector. Full 360 degree swivel eye helps prevent tangles.