1.3Pcs set of drill bit extension holder with different length suit for situation of narrow space. Reaching places where hands can not normally reach into.

2.Quick change and release system allows you to quickly install, lock and unlock the bit easily. 

3.Strong magnetic bit holder provides convenient pick-up and retention of screws,which greatly improve work efficiency.

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.