Built from the highest quality materials. Made of special tool steel, with excellent resistance to degradation as a result of intensive and continuous use. Consists of: 3/8" heads with diameter: 8-10-11-12-13-14-15-16-17-18-19-20-21-22 mm, 2 3/8" extensions, Pcs 1- 2-3, Ph. 1-2-3, hex. 3-4-5-6-7 mm, Torx 10-15-20-25-27-30-40, std 4-5-6-7 mm. The rubber handle absorbs the strain even in the most demanding jobs. Ideal for professionals in the field of mechanical repair and assembly.