The product is made of hard alloy steel, which has the advantages of integral heat treatment, high hardness, torsion and long service life. The surface is processed by special technology to improve the surface hardness. The handle is made of rubber handle, designed according to ergonomics, which increases friction and is not easy to and feels comfortable. High density, strong and durable Conveniently used for engraving machine, electric spindle, spindle motor extension rod, clamping nut rotation, etc. Describe Name; ER type machine tool wrench Material: alloy Quantity: 3pcs Model: ER25 ER32 ER40 Color: Black & Red Package Contents: 3 x spanner Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.