The Bosch PRO 9 Piece 1/4" Drive Deep Hexagon Impact Socket Set is a professional-grade socket set designed for tackling hex screws, bolts, and nuts with a square-drive impact wrench. Manufactured from heat-treated CRMO (chrome-molybdenum) steel with thick-walled construction, these sockets are built to withstand high torque and heat — making them well suited to demanding applications such as plant installations and heavy industrial work. Each socket features a black phosphate coating for reliable protection against rust and corrosion. Laser-marked and colour-coded sizing makes it straightforward to identify the correct socket at a glance on site. A groove and through hole allow the sockets to be secured to your impact wrench using a pin and ring for a particularly firm hold when conditions demand it. Features and Benefits: • Heat-treated CRMO steel construction resists high torque and heat • Thick-walled design for enhanced durability under heavy use • Black phosphate coating provides protection against rust and corrosion • Laser-marked and colour-coded for fast, easy socket identification • Groove and through hole allow pin and ring securing for a stronger hold Specifications: Shank Size: 1/4" Key Widths: 6, 7, 8, 9, 10, 11, 12, 13, 14 mm Length: 50 mm Net Weight: 0.444 kg Contents: Set description: 1. Set