Product HighlightsProduct SummaryUse the Snap Lock Punch tool to make 3/8-Inch (1 cm) wide impressions on metal edges to join pieces of sheet metal, duct or pipe. The compound-leverage mechanism 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.Features Drop-forged steel jaw easily punches 3/8-Inch (1 cm) wide impressions on metal edges to easily join pieces of sheet metal, duct or pipe Compound-leverage mechanism for greater control and easy operation Comfortable, contoured grips cover hardened steel handles All-steel construction and nickel-chrome plated hardware provides long life and durability Convenient self-opening latch for one handed operation For use on sheet metal and vinyl and aluminum siding Quality tool for HVAC professionals provides superior results