Features ???? PROFESSIONAL DESIGN: Drill rods have excellent concentricity and are designed for use with 1/4’ hex bits. An excellent tool for most screwdrivers and drills for all your needs. ???? HIGH QUALITY: The surface of the quick-change screwdriver is phosphated to prevent rust. Every detail is carefully processed to maintain the stability and precision of the product. You can use it with confidence. ???? WELL SET: The bit holder uses super strong magnets to hold the bit quickly and securely, improving your work efficiency. It provides high strength protection with excellent rust and corrosion resistance. ???? MAGNETIC: The magnetic screwdriver uses a professional magnetic linkage for stable performance. The drill extension is compact and portable, suitable for a variety of sets. ???? COMPATIBILITY: The magnetic screwdriver extension insert is compatible with pneumatic screwdrivers, drills, electric screwdrivers and drivers. It will not twist like other tools, very safe and reliable. Description: The extension holder is designed for 1/4" hex shank bits, can be used for pneumatic screw drivers, electric drills, electric screwdrivers. It is strong magnetic and anti-rust. Features: Designed for 1/4" hex shank bits. Good concentricity. Extra-strength magnet holds bits securely. The surface is phosphatized to prevent rust. High quality connection rod, magnetic link rod. Compatible with pneumatic screw drivers, electric drills, electric screwdrivers, screwdrivers. Specifications: Materiel: Carbon steel Length: About 60 mm / 2.36" Hexagonal Size: 1/4" Color: Grey Quantity: 10 pcs per bag Weight: 202g(approx.) Package includes: 10 x Screwdriver Bit Holder Note: Please allow 1-3mm error due to manual measurement. Thanks for your understanding. Package List