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 independently 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