Built from the highest quality materials. Made of special tool steel, with excellent resistance to degradation as a result of intensive and continuous use. Composed of: 3/8" heads with diameter: 8-9-10-11-12-13-14-15-16-17-18 -19-20-21-22-23-24 mm, 2 extensions 3/ 8", 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.