The set is supplied with 20 hardened and tempered 8660 alloy steel 1/4″ bits x 25mm long Contents: screwdriver with 1/4″ magnetic holder, adaptor 1/4″ sq. drive x 1/4″ hexagon, magnetic bit holder 1/4″ (F) x 1/4″ (M) Contents: 4 plain slot bits 4, 5, 6 and 7mm, 3 cross slot bits: No.1, 2 and 3, 3 PZ TYPE bits: No.1, 2 and 3, 3 hexagonal bits 4, 5 and 6mm, 7 Draper TX-STAR bits: T10, T15, T20, T25, T27, T30 and T40 Part Number:DRA43624, Manufacturer: Draper