The Greenlee 7625 11-Ton Hydraulic Knockout Driver with Foot Pump features a compact, lightweight design for portability, and fast, easy one-person operation. A Slug-Buster punch profile splits slugs for easy removal. Users are provided with an optimized die design for a wide range of materials and a knurled edge on the punches for a better grip. This tool features draw studs that have dog point tips, which help eliminate cross-threading [Hex key access is provided for easy removal from the tool] Hex key access is also provided for easy removal from the tool. The Greenlee 7625 works with all Greenlee knockouts, and the same draw studs used with Intelli-Punch, LS50L2, 746A ram. A size range of 1/2 in. to 4 in. is offered with this unit.