Knockout punch in 4 seconds. An advanced knockout tool used with a cordless drill to draw punch dies together for quick accurate knockouts. No hydraulic ratcheting or mess. 9 Maxis punch dies sizes ½” to 4”, or use your current punch dies. Punch kit includes Maxis Marksman conduit layout tool to quickly mark center knockout points. Punch kit includes step drill bit. 2 inch knockout in 4 seconds. 4 inch knockout in 6 seconds.