3pcs Magnetic Drill Bit Extensions，1/4" Hex Shank Quick Release Screwdriver Bit Holders, Magnetic Drill Bit Extension Adapters for Impact Driver BitsHex shank quick-release holders: Durable stainless steel & chrome vanadium. Designed for 1/4" hex shank bits. Surface coating for protection against elements, oil, and fluids. Ideal for electric/pneumatic screwdrivers, power tools, and drills. Perfect for automotive repairs, technicians, and hobbyists. Locking mechanism and a magnetic piece for secure attachment. Boosts work efficiency with hard-to-reach screws.Stainless steel and chrome vanadium steel material, durable to useQuick release system allows to quickly install, lock, and unlock the bitFit screwdriver bits, drill, batch head, and screwdriver head conversion1/4" hex shank fits power drills, impact drivers, and hand-held driversLocking interface, built-in magnetic, automatically pop up batch headPackage Includes: 3 x Quick Release Drill Bits Stainless steel and chrome vanadium steel material, durable to use Quick release system allows to quickly install, lock, and unlock the bit Fit screwdriver bits, drill, batch head, and screwdriver head conversion 1/4" hex shank fits power drills, impact drivers, and hand-held drivers Locking interface, built-in magnetic, automatically pop up batch head