The Mayhew Tools 150 Line-14-piece Punch and Chisel Set, No. 15070, is constructed of high-grade S-2 tool steel, along with a full heat-treated shank. This set is comprised of the company's most popular punches and chisels with varying sizes to cover all applications. Designed with a parabolic head to reduce mushrooming and a black oxide finish for enhanced corrosion resistance, the tools in this set come with a full, unconditional lifetime warranty.