QWORK® 3 Pcs 1/4 Inch Hex Shank Quick Release Bar Socket Screwdriver Bit Holder, Magnetic Extension Chuck Adapter Set for Screws, Nuts, Drill, Driver, Drill and Handheld Driver

1) 3 pieces set with different length (60mm, 100mm, 150mm) 2) Quick change and release system allows you to quickly install, lock and unlock the bit easily 3) Magnetic bit holder provides convenient pick-up and retention of screws 4) Hex Shank: 1/4" hex shank (6.35mm)can be easily fit into power driver, drill and handheld screwdriver 5) Extension set for all kinds of screwdriver bits, screwdriver head conversion uses