The GripEdge Tools 17-pc Master 3/8" Drive Impact Hex Set, No. MIHB17S, are impact-ready and can replace standard hex tools. The bits feature a bidirectional design that the company says provides up to 50 percent more torque on new fasteners and up to 400 percent more torque on damaged ones. The set includes sizes 4mm-12mm and 5/32"-1/2", and each bit has an oversized, laser-etched size marking for easy identification. The bits are made from CrMo steel for increased strength and durability. The set is packaged in a foam insert inside of a plastic case.