Name: CNC lathe auxiliary tool holder Material : alloy which has strong elasticity and high hardness. It has the advantages of wear resistance, resistance and high stability. Practicality: It can be matched with a variety of matching tools such as tapping handles, handle extension rods and U drills for different work tasks. The inner hole is precisely ground to that the inner hole control accuracy is ≤0.02mm. The center point of the inner hole is fixed, and there is no need to align the tool, which greatly improves efficiency. Colour:black Material:45 steel Package Contents: 1 * SBHA16 reducer knife set 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.