Expert Quality, insert bits manufactured from S2 silicon steel, hardened and tempered with shot blasted finish. Bit holders made from chrome vanadium steel hardened, tempered and chrome plated. Spare bits are available. Packed in steel case and display carton. Contents: 1 x bit holder 10mm hexagon x 3/8" sq. drive, 1 x bit holder 10mm hexagon x 1/2" sq. drive, 7 x 30mm Draper TX - STAR® ; bits: T20, T25, T30, T40, T45, T50, T55, 7 x 75mm Draper TX - STAR® ; bits: T20, T25, T30, T40, T45, T50, T55, 5 x 30mm spline bits: 5, 6, 8, 10, 12mm, 5 x 75mm spline bits: 5, 6, 8, 10, 12mm, 7 x 30mm hexagonal bits: 4, 5, 6, 7, 8, 10, 12, 7 x 75mm hexagonal bits: 4, 5, 6, 7, 8, 10, 12mm