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. Knurling Knurler Tool Holder Linear Knurl Tool Lathe Adjustable Shank with Wheels Lathe Tools This knurling tool fits in the standard tool post of the mini lathe without any modification. Model Number:Knurling Tool Wheel material:CR15 Knurling materials :45 # carbon steel colour:Black Material:steel size:knurling wheel figure diameter:0.8mm, 1.2mm, 1.8 mm Knurling wheel diameter:1.9cm Package Contents: 1 x knurling tool with 2 wheels 4 x spare knurling wheels Only the above package content, other products are not included. Note: Light shooting 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.