Comes with fine, medium,and coarse diamond knurls. Rigidity, wear resistance, anti-demolition damage strength. Anti-rust resistant, high processing efficiency. High strength and hardness. Durable in use. Used for processing the work piece surface pattern. The knurling wheel is for replacing your linear wheel. Features - Color: Black. - Material: Steel. - Size: 2.50 x 2.50 x 0.70cm/ 0.98 x 0.98 x 0.28 inch. - Knurling tool set can be used for processing the work piece surface pattern. - The mechanical process metal knob or other work at the appearance of rolling pattern for anti-slip. - Made of steel and anti-rust resistant. Non-slip function, anti-demolition damage strength, . - Durable in use. for replacing your linear wheel. - Raises an angled ridges in a diamond pattern on any workpiece for a decorative finish or proof grip. Package list: 2 grain knurling wheel