This Snap Lock Punch raises a louvered shaped projection on metal edges for locking into a rolled edge of sheet or piece to be joined. Metal pieces snap together and are fastened securely. Compound Handle Leverage for maximum ease of operation. Punch impression spaced 3/8 in. from edge of metal. Heavy forged cutting jaw. Rust resistant nickel plate and black oxide finishes. The handle opening of Malco's REDLINE gripped tools maximizes the powerful leverage of compound head-to-handle linkage while providing a more comfortable operating range for your hand. Ergonomic handle contours with an over-molded, non-slip handle insert assures a natural fit and feel for the way you work. Easy one-hand-operation, including an easy open and close latch motion, always leaves a free hand to steady work piece.