Description: The bit extension holder is made with a high quality material with heavy duty construction to ensure maximum efficiency. The chrome finish of drill bit holder give an added resistance to rust. The bit holder can be used for a variety of drivers making it very handy and flexible. Features: Hard steel holder extension bar for maximum durability, the heavy-duty construction allows for long service life. Bit holder has strong magnetism for quick connect or disconnect and ensuring stay in place while driving. Universal 1/4inch quick hex shank fit most electric drivers, hand-held drivers and bits. The small size allows you to bring your bit extension bar anywhere to get any job done and can fit into many tool bag. Very helpful to remove or tighten a large number of screws after you've started or loosened them. Specifications: Bit Holder: Material: Chrome-vanadium steel(black), stainless steel(silver), aluminum(red) Hex Socket Size: 6.35mm(1/4") Head diameter: 7.5mm(0.29") Length: 60mm(2.36") Weight: 20g Package Includes: 1 x Bit Holder Extension Bar