This Masterforce assorted bit set is perfect for any cordless impact drill user. The 21-piece set includes torsion zone rugged bits suitable for fastening applications. Each bit has a diameter of 3/8 inches and is made of S2 material with a chrome finish. The set weighs 9 oz and is designed for use with MasterForce brand tools. The package quantity is 1 and the item is manufactured in Malaysia. This set is a great addition to any tool collection and is perfect for DIY and professional use.