Features 1. Wide Application: The socket chuck adapter is widely used in mold manufacturing, pneumatic screwdrivers, DIY projects, auto repair, and other professional machine maintenance tasks. 2. One-Piece Design: Made using advanced hot forging technology to form a single piece, enhancing material density and significantly improving strength and durability. 3. High-Quality Materials: Constructed from chrome vanadium alloy steel, this heavy-duty hex drill bit set offers excellent wear resistance and reduces screw slippage. 4. Square Hole Design: Features a clamp pad inside the square hole for a more secure grip, providing increased stability and convenience during use. 5. Compatibility: Designed to be used with hand electric drills (not included) to maximize working efficiency. Specification Item Type: Power Drill Socket Material: Chrome Vanadium Alloy Steel Sizes: E4, E5, E6, E8, E10, E12, E14 Shank Diameter: Approx. 6.35mm / 0.25in Surface Treatment: Blackened finish with rust prevention Hardness: 60-62 HRC Function: Suitable for the installation and removal of most hexagonal torx anti-theft screws found on vehicles. Package List 7 x Power Drill Sockets 1 x Rubber Base