This manual knockout punch driver kit creates precise conduit holes from 1/2 inch to 1-1/4 inches in diameter for electrical installations. The kit works with mild steel up to 3.5mm (10 gauge), aluminum, fiberglass, and plastic materials using a ratchet, wrench, or electric driver. The slug splitting design produces clean, uniform round holes with smooth edges and makes slug removal straightforward. Manual operation works effectively in tight areas where larger hydraulic equipment won't fit. The complete kit arrives in a rugged storage case with a secure-closing lid that keeps all components organized and portable. Draw stud threads are compatible with TEMCo hydraulic drivers for expanded capability.