The Vessel Tools IMPACT BALL Torsion Bit 52-pc Set, No. IB52P01U is made using a new alloy steel, VoHA (Vessel Outstanding High-Performance Alloy), with a hardness of 62 HRC. The bits come in a hard case, and according to the company, the shock absorption at the ball torsion part of the bit makes it 30 times tougher for greater durability. The set comes with a mix of Phillips head, slotted, square, Torx, hex, pozidriv bits, as well as magnetic nut setters in 1/4", 5/16", and 3/8", socket adapters in 1/4", 3/8", and 1/2", and a mag enhancer.