Franklin Performance Chassis Punches

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Chassis punches, also known as screw punches or knockout punches, are used to easily punch holes in sheet metal. A smaller hole is pre-drilled into the material, then the chassis p unch is used to enlarge it. Made from high strength alloy steel with a heat treatment and unique oil impregnation to prevent corrosion — built to last a lifetime. Sizes Available: 3/4" (19mm) – pre-drill size 10.5mm 1" (25.4mm) – pre-drill size 12.5mm 1.25" (31.8mm) – pre-drill size 12.5mm 1.5" (38.1mm) – pre-drill size 20.5mm 2" (50.8mm) – pre-drill size 20.5mm Cutting Capacity: Aluminium, brass, copper: 4.0mm Mild steel: 3.0mm Stainless steel: 1.5mm Show more