Made from high-quality T10A tool steel through heat treatment, achieving a hardness of HRC 58-64, with an inner hole grinding accuracy of ±0.002mm. Suitable for batch part drilling and positioning, standard specifications include Φ3-Φ20mm, and custom non-standard sizes are supported. The surface is blackened for rust resistance and wear resistance. The accompanying fixture installation holes are precise, effectively improving drilling machine processing efficiency by over 30%.