Made from keystone hardened tool steel. Sides of bit tip are made parallel for short distance toward shank for better -- more consistent fit to help prevent mars and dings in and around the screw slot. Features square shank; hardened tips; square, hardwood handle and nickel-plated ferrule. Made in the USA, guaranteed not to break or chip. Your choice: set of 8 or by the each -- for when you need just one or when you want to keep one specially ground for a particular job.