Specification: Brand new Material: Steel Color: Black (Knurling) + Brown (Wheel) Knurling wheel figure: approx. 0.5mm, 1.0mm, 2.0mm Knurling wheel diameter: approx. 20mm 0.5mm Diagonal Linear Knurling Wheel: Knurling pitch: 0.5mm Net pulley diameter: approx. 26mm Hole diameter: approx. 10mm Hanawa thickness: approx. 8mm 1mm Diagonal Linear Knurling Wheel: Knurling pitch: 1.0mm Knurled wheel outer diameter: approx. 26mm Hole diameter: approx. 10mm Knurled wheel thickness: approx. 8mm 2mm Diagonal Linear Knurling Wheel: Knurling pitch: 2.0mm Knurled wheel outer diameter: approx. 26mm Hole diameter: approx. 10mm Knurled wheel thickness: approx. 8mm Total size: 25*8mm (Outer Diameter * Thickness) Feature: Two rollers twill direction: one is positive and the other one is negative. Comes with fine, medium,and coarse diamond knurls. The mechanical process metal knob or other work at the appearance of rolling pattern for anti-slip. 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. Ideal for replacing your damaged Linear Knurl wheel Package included: 1 x Knurling 6 x Knurling Wheel Note: Please allow 1-3mm errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.