The bosch pro 9 piece 1 2 drive deep hexagon impact socket set is a professional-grade socket set designed for use with square-drive impact wrenches on heavy-duty fastening tasks. Manufactured from heat-treated crmo chrome-molybdenum steel with thick-walled construction, these deep impact sockets are built to withstand high torque and resist heat making them well suited to demanding applications in plant installations and heavy industrial environments. A black phosphate coating provides reliable protection against rust and corrosion. Each socket features laser-marked sizing and colour-coding for fast, accurate identification on the job. A groove and through hole allow the sockets to be secured to your impact wrench using a pin and ring, providing a firm, confident hold where extra security is needed. Features and benefits: heat-treated crmo steel construction for high torque resistance and durability black phosphate coating protects against rust and corrosion thick-walled design for reliable performance under heavy industrial loads laser-marked and colour-coded for fast socket identification groove and through hole for secure pin and ring fixing to impact wrenches 9-piece set covering key widths from 10mm to 27mm specifications: drive size: 1 2 key width mm : 10, 11, 13, 17, 19, 21, 22, 24, 27 length: 77mm net weight: 2.385Kg contents: set description: 1. Set