Generic Gun Black 0.75" Inside Diameter Oval Ring Lobster Clasp for Strap or Dog Collar Buckle Pack of 10 Inside swivel tail oval ring diameter:0.75". Lobster clasp total Length:1.87". 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.