Knurling wheel : about 0.5mm, 1.0mm, 2.0mmKnurling wheel diameter: 20 mm/0.79 inch0.5mm diagonal linear knurling wheel:Knurling pitch: 0.5mmNet pulley diameter: about 26mm / 1.02 inch: about 10 mm/0.39 inchFlower wheel thickness: . 8 mm/0.31 inch1mm diagonal linear knurling wheel:Knurling pitch: 1.0mmKnurling wheel outer diameter: about 26mm / 1.02 inches: about 10 mm/0.39 inchKnurling wheel thickness: about 8 mm / 0.31 inch2mm diagonal linear knurling wheel:Knurling pitch: 2.0mmKnurling wheel outer diameter: about 26mm / 1.02 inches: about 10 mm/0.39 inchKnurling wheel thickness: about 8 mm / 0.31 inch size: 25 x 8mm / 0.31 x 0.98 inch (outer diameter x thickness)Colour:BlackMaterial:SteelPackage Contents:1 * Knurling tool6 * knurling wheelOnly the above package content, other products are not included.Note: Light 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.