Large cutter features five sizes ranging from 1/2? to 1?. Cut perfect circles every time! The holes have been drilled, reamed and then honed to make the finest and cleanest cutter available. The punches are oil-quenched tool steel and drawn for hardness and durability. The bottom base is case-hardened and ground. Cuts non-ferrous metal up to 14 gauge. Measures 3? x 2-3/4?.