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. Great for using with our anodized aluminum sheets. 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.