Bit is constructed of M 2 high speed steel for the best combination of strength, heat resistance, and wear resistance. For general use in wood, metal, and plastic. Black oxide coating resists corrosion. 135 split point ensures a true start and eliminates bit walking. 3/8'' reduced shank on bits 25/64'' and larger. Large strike cap withstands repetitive hammer strikesErgonomic handles with ProTouch Grips are durable enough to withstand jobsite abuseHigh quality hardened steel blade for superior performance and edge retentionTough design is perfect for high-impact construction applicationsSet includes 1/2 in., 3/4 in., and 1 in. chisels, and a folding carrying wallet