Features 【Carbon Steel Material】: The screwdriver extension bar is made of high quality carbon steel and chrome vanadium steel, with heavy duty construction, not easy to rust, corrosion resistant and high strength for durability maximum. 【Strong Magnetism】: This hex drill bit holder has strong magnetism for quick connection or disconnection and keeps it in place during use. It conforms to standard specifications and is manufactured under strict quality control. 【Easy to Carry】 : The small size allows you to bring socket adapter drill bit anywhere to do any job and can fit in many tool bags. There are three extension holders in different lengths and you can use the proper one for various needs. 【Widely Application】: Universal 1/4 inch hexagonal handle and 1/4 inch hexagon socket are suitable for most electric screwdrivers, electric drills and electric drills, which make the electrical magnetic bit holder very practical and versatile. 【Service Guarantee】: We provide 24-hour after-sales service, if you have any questions about the 1/4" shank tool, please feel free to contact us, we will try our best to solve your problem. Description: These bit extension holders are made with high quality carbon steel and chromium-vanadium steel with heavy duty construction to ensure maximum durability. It can be used for a variety of screwdrivers, drills and bits making this extension holder very handy and multipurpose. Specifications: Material: Carbon steel and chromium-vanadium steel Hex Shank Size: 1/4" Hex Socket Size: 1/4" Length: 6cm / 2.36", 10cm / 3.93", 15cm / 5.9" Quantity: 3 Package Includes:3 x Bit Holders Package List