The Klein Tools 86528 Snap Lock Punch to make 3/8 in. (1 cm) wide impressions on metal edges to join pieces of sheet metal, duct or pipe. The Klein Tools 86528 features a compound-leverage mechanism that provides greater control and easy operation. This cutting and notching tool has comfortable, contoured grips covering hardened steel handles and features a convenient self-opening tool latch. The all-steel construction and nickel-chrome plated hardware provides long life and durability.