Product description
Industrial grade chromium vanadinum steel is used for forging, heat treatment, high hardness and impact resistance.
Strong torsion,the thicken design suitable for electric and pneumatic tools,great impact resistance.
Surface polishing phosphating treatment make it has great erosion resistance.
Simple design and beautiful appearance.
Material:chromium vanadinum steel
Style:1/4 inch(40mm); 3/8 inch(50mm); 1/2 inch(70mm)