A clamp that accepts three 1-inch diameter balls, with a base plate compatible with the Ikelite Auxiliary Ball Mount for lightweight accessories. The Mark II (V2) design uses a groove and o-ring to prevent slippage, providing improved grip with less tightening force. Components are hard-coat type III anodized for a long-lasting, scratch-resistant finish, and the clamp can be finger-tightened underwater for repositioning without fully releasing. Weight is about 2.8 oz.