Simple operation, convenient use, fast perforation speed. 45 carbon steel forging, high temperature quenching, sharp , high hardness. Cutting is not easy to break, sharp and durable. Tungsten carbide cutter head has the characteristics of high hardness, strong impact resistance and fast drilling speed. Center positioning: Drill point design, strong wear resistance, cutting. It can be used for a of walls: red brick wall, cement wall, concrete wall, soil embryo wall, mixed brick wall, etc. Colour:As Shown Material:45 carbon steel Package Contents: 1 x 45mm wall 1 x 50mm wall 1 x 55mm wall 1 x 60mm wall 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.