Greenlee  3579 SurePunch PunchDown Tool With Both 110 and 66 Blades Cushioned grip, molded to the shape of your hand for comfort and a sure non-slip hold Adjustable, spring-compression HI/LO impact tool Increased HI/LO impact force to meet demands of new cable types and AWG size For 28-22 AWG, solid or stranded wire, blades twist and lock into place Cushioned heel for comfort in the palm of your hand