The Black Diamond Camalot - averaging 30% narrower heads than any other 3- or 4-cam units on the market. Patent-pending interlocking cams allow for solid placements in narrow constrictions and pin scars. Patent-pending compression drive springs push each cam indepently with greater force so they hold better in tough placements . U-stem design provides a balanced combination of stiffness and flexibility. Ribbed trigger and thumb rest improve handling when you're really pumped. Color-coded units and slings for quick and easy ID. 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.