With 1/4" square drive (6.3 mm) (for tightening torques up to 25 Nm): Screwdriver bits for hexagon socket screws size 2 - 6 mm and screwdriver bits TX 8 - TX 40 (with frontal drilling) as well as external TX E 4 to E 10. With 1/2" square drive (12.5 mm) (for tightening torques from 25 - 210 Nm): Screwdriver bits for hexagon socket screws size 7 - 14 (short version, 55 mm) and sizes 6 - 12 (long version, 100 mm), for TX screws size 45 - 60 (short version) and for external TX size E 12 - E 20, plus 5 angled hexagon socket keys size 1.25 - 1.5 - 2.0 - 2.5 and 3.0 mm. Other contents see illustration. Supplied in compact plastic case. High-strength, with snap lock and stable insert.