Expert Quality, bits manufactured from SNCM - V steel hardened and tempered with shot blasted finish. 1/2" square drive holder made from chrome vanadium steel hardened, tempered and chrome plated for corrosion resistance. Display packed. Contents: 1 x Bit holder 1/2" sq. drive, 6 x 30mm hexagonal bits: 4, 5, 6, 8, 10, 12mm