Descriptions: This knurling tool is made of high quality 45 # carbon steel, and the wheels are made of CR15, durable in use.This knurling tool is specifically for the mini lathe.Great design helps reducing the load on the lathe spindle bearings compared to any other standard knurling tool. Features: This knurling tool is made of high quality 45 # carbon steel, and the wheels are made of CR15, durable in use. This knurling tool is specifically for the mini lathe. Great design helps reducing the load on the lathe spindle bearings compared to any other standard knurling tool. Pressure is applied via the turn screw instead of the lathe cross slide. It is also works with any of the quick change tool posts. This knurling tool fits in the standard tool post of the mini lathe without any modification. Specifications: Knurling materials :45 # carbon steel. Wheel material: CR15 Color: black knurling wheel figure diameter: approx.0.8mm, 1.2 mm, 1.2 mm Knurling wheel Diameter: Approx.2cm/0.8inch Size: as the picture Weight: 600g Package Included: 1 x knurling tool with 2 wheels 4 x spare knurling wheels