High Strength Steel Cores: Reinforced with hardened steel inner sleeve and premium alloy structure to withstand heavy duty tasks, includes 10piece 25mm bit set for multisize screw handling Wide hexagonal Shank Compatibility: Standard 6mm hexagonal shank fit most electric screwdrivers, drills, and quickly release chucks for seamless tool integration and versatile use Strong Retention: Built in powerful socket securely holds bit and screws in place, slippage and misalignment to ensures efficient and precisely operate every time Adjustable Extension Design: Features 80mm / 120mm two length extension option with smooth telescoping mechanism, perfect for reaching deeply holes and narrow spaces during screw driving tasks in various applications Durability Aluminum Construction: Made with sandblasted aluminum shell for super grip comfort, rust resistance, and long last durability under frequent usage, Manufacturer: APGLSXY