SENRISE Screwdriver Bit Holder 3PCS 1/4" Hex Shank Magnetic Drill Bits Quick Release Drill Bit Extension Set for Power Drill Screwdriver (60,100,150mm)

3pcs set with different length: 2"(60mm),4"(100)mm,6"(150mm), Extend all kinds of screwdriver bits, screwdriver head conversion uses Quick change and release system allows you to quickly install, lock and unlock the bit easily Built in strong permanent magnet(the hole part), shaft holds bit securely, great for working with hard to reach screws 1/4" Hex shank quick change and adjustable collar, one hand operation, perfect for drill, screwdriver, batch head and other to transfer Note: Only the bottom of the hole part is magnetic, the hex shank is NOT magnetic! Only for single head hex drill, Manufacturer: SENRISE