The Bosch PRO 9 Piece 3/8" Drive Deep Hexagon Impact Socket Set is a professional-grade socket set designed for use with square-drive impact wrenches on hex screws, bolts, and nuts. Constructed from heat-treated CRMO (chrome-molybdenum) steel with thick-walled construction, these sockets are built to withstand high torque demands without deforming or failing. A black phosphate coating provides reliable protection against rust and corrosion, making the set well suited to demanding environments such as plant installations and heavy industrial work. Each socket is laser-marked and colour-coded for fast, at-a-glance identification on the job. A groove and through-hole design allows the sockets to be secured to your impact wrench using a pin and ring system, providing a firm, reliable hold during high-stress applications. Features and Benefits: • Heat-treated CRMO steel construction for high torque resistance and long-term durability • Thick-walled design engineered to withstand heavy industrial use • Black phosphate coating protects against rust and corrosion • Laser-marked and colour-coded sockets for quick size identification • Groove and through-hole design compatible with pin and ring retention system Specifications: Shank: 3/8" Key Width (mm): 7, 8, 10, 12, 13, 15, 16, 17, 19 Socket Length (mm): 60, 62, 63, 63, 63, 63, 63, 63, 63 Net Weight: 1,080 kg Contents: Set description: 1. Set