Generic Silvery 0.44" Inside Diameter Oval Ring Lobster Clasp Claw Swivel for Strap Dog Collar Pack of 10 Inside swivel tail Oval ring diameter:0.44". Lobster clasp total Length:2.05". Snap opening mouth maximum size about:0.22". Lobster all kinds of purse or bag strap connector. Full 360 degree swivel eye helps prevent tangles.