The Black Diamond C4 Camalots completely new design makes them easier to use and lighter than any Cam to date. Better? No, the Black Diamond C4 Camalots have gone way past "better" and clear into "holy crap!" The C4’s completely new design makes them easier to use and lighter. Black Diamond managed to shave about 1 ½ pounds off the set, at the same time increasing their range so much that a couple half sizes became unnecessary. The C4’s include a thumb loop that makes them about a billion times easier to place one handed, and gives you a second point to clip in to. Almost forgot, the C4’s cost about the same as their predecessors. Size: #3. Return Policy: Climbing equipment sales are final. In order to guarantee the life saving integrity of the climbing gear we sell -- we cannot accept returns on any life safety climbing or mountaineering equipment.