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