3/8″ reduced shank high speed steel drill bit sets bit is constructed of m-2 high speed steel for the best combination of strength, heat resistance, and wear resistance standard 118 degree point for use in wood, metal, and plastic 3/8″ reduced shank fits all 3/8″ drills 29-piece set in metal index case includes drill bit sizes 1/16″ through 1/2″ in 1/64″ increments