1.Made from S2 steel and are tempered twice for extra hardness and durability.
2.Fast, convenient, disassemble screws, tacks.
3.It can remove some of the common screwdriver can not be disassembled damaged bolts, screws, bolts and pipes.
4.Reverse thread bits easily remove screws, bolts, studs, and threaded pipe fittings.
5.Speed can be changed in the opposite direction of rotation of the drill in conjunction.