*The screwdriver passes through the magnetizing for ring, the magnetization is completed, and the magnetic force is enhanced. *Screwdriver magnetic for ring is suitable for screwdriver bit with 6.35mm shank diameter. *Put the screw bit on the outer dent of the magnetic for ring to demagnetize. *Insert the magnetic for ring into the screwdriver rod to increase the magnetism of the screwdriver tips and lock the screw. Easy to adsorb metal parts *Screwdriver Magnetizer only, other accessories demo in the picture is not included!, Manufacturer: Akfldms