Suitable for installation in pneumatic screwdrivers, electric screwdriver, rechargeable drill, using the batch. , in the installation can easily absorb screws. Widely used power tools, electric screwdriver assembly, electronics industry, household appliances, instruments industry, furniture industry screw equipment. Screwdriver is of high-strength Steel, very , firm and for us to use. Toughness is good, hard to rupture and wearproof., Manufacturer: Haiki