Tianbang Gun Black 1" Inside Diameter Oval Ring Pincers Lobster Clasp Claw Swivel Eye Hole for Strap Pack of 5 Swivel tail oval ring inside diameter:1". Lobster clasp total Length:2.5". Snap opening mouth maximum size about:0.6".Roundness eye hole diameter:0.4" Lobster all kinds of purse or bag strap connector. Full 360 degree swivel eye helps prevent tangles.