Check the listing for details. T40 Torx Bit Socket 100mm Length 1/2" Square Extension Impact Bit, Black. Condition: New. Listed at 15.95 USD. The drill bit is forged from S2 steel and treated with carbon black phosphating. It has high strength and hardness and can withstand large torque without deformation, is wear-resistant and durableThe socket drive adopts an anti-drop groove design, the tool connected to the bottom is not easy to fall off, more stable, and will greatly increase the torque, allowing you to work more efficiently and easilyThe chamfer design can be easily, smoothly and accurately inserted to protect the drill bit and fasteners from damageThe drill socket is used to quickly loosen and tighten nuts and bolts in hard-to-reach areas, making it suitable for bicycle, car repair or industrial work projects that require light torque application, and can be used with tools such as 1/2" electric drills, ratchet wrenches, manual electric wrenches, etc.