Expert Quality, bits manufactured from SNCM - V steel hardened and tempered with shot blasted finish. 1/2" square drive bit holder from chrome vanadium steel hardened, tempered and chrome plated for corrosion resistance. Display packed. Contents: 1 x bit holder 10mm x 1/2" sq. drive, 1 bit: 8 x 30mm long, 1 bit: 12 x 75mm long