screwdrive bits with thread 1.S2 material 2.U shape head 3.58-61 degree hardness 4.sand blasting finished

1.Item: U-shape Power driver bits(screwdriver bits,electric screwdriver bits)

2.Material :industrial grade S2 steel.

3.Size:H1/4"*50L*6.0*U8

U-shape tip screwdriver bits