Tools and nuts can be used to refresh your hands, put on and take off. wash-out, Nickel Plated for Corrosion Resistance. [Features] · in the processing, like the wings of a butterfly nut, with clamping or loosen it to your hand. · wash-out, Nickel Plated for Corrosion Resistance. [HOW TO USE] 1 without tools, you can repeat the tightening of the screw where you want to put to use. 2 fabric compared to corrosion resistance and durability.