Spring-opeing O-rings for key ring, purse loops, handbag, diy craft projects and more. Please see next picture for dimension of each size. Size options indicate inside diameter of O-rings. Made of zinc alloy metal with rust-preventive coating. High strength and high resistant to corrosion. Pack of 2 O-rings. Select your wanted size and color! More metal craft accessories for your creations, please visit our CRAFTMEMORE storefront on Amazon! Spring-opeing O-rings for key ring, purse loops, handbag, diy craft projects and more.