Part Number:T1B9170-L001583889FBA Package Dimensions:18 x 6.9 x 2.3 cm; 250 Grams Size:Variety Pack Finish:Chrome Material:Metal Item Package Quantity:1 Number of Pieces:6 Compatible fastener range:0.25 inches Batteries Required?:No Item Weight:250 g Made of industrial-grade heavy-duty CR-V material. Featured with 1/4"inch hex shank. Fit for most drills.strong built-in magnetism for quick release. About this item WHAT YOU GET: 6 pieces drill bit extension set with built-in magnetism in three sizes (60mm, 100mm, 150mm) , 1/4" hex magnetic tip fits all standard hex shank bits. STONG MAGNETISM: Strong built-in magnetism which makes sure screwdriver bits stay in place, quick change and release system allow you to quickly install, lock and unlock the bit easily. HIGH QUALITY: quick release bit holder made of industrial heavy-duty chrome vanadium steel(CR-V) for maximum durability and long life. WIDE APPLICATIONS: The drill bit extender set is designed with a 1/4" hex shank and a 1/4" extension chuck adapter. 1/4" hex shank (6.35mm)can be easily fit into screwdriver bits, drill bits, pneumatic drills, impact drivers, etc. SATISFACTION GUARANTEE: We provide a two-year warranty, so please purchase with confidence! If you have any concerns or questions, please feel free to contact us. See more product details WHAT YOU GET: 6 pieces drill bit extension set with built-in magnetism in three sizes (60mm, 100mm, 150mm) , 1/4" hex magnetic tip fits all standard hex shank bits. STONG MAGNETISM: Strong built-in magnetism which makes sure screwdriver bits stay in place, quick change and release system allow you to quickly install, lock and unlock the bit easily. HIGH QUALITY: quick release bit holder made of industrial heavy-duty chrome vanadium steel(CR-V) for maximum durability and long life. WIDE APPLICATIONS: The drill bit extender set is designed with a 1/4" hex shank and a 1/4" extension chuck adapter. 1/4" hex shank (6.35mm)can be easily fit into screwdriver bits, drill bits, pneumatic drills, impact drivers, etc. SATISFACTION GUARANTEE: We provide a two-year warranty, so please purchase with confidence! If you have any concerns or questions, please feel free to contact us.