Thank you for viewing. This is a meticulously crafted, one-of-a-kind groove plate for engraving tools, finished with diameters of 15mm, 20mm, and 30mm. This item is not available anywhere else, so please consider purchasing it soon if you are interested. ◼️Dimensions Approximately 21mm x 30mm x 65mm ◼️Weight Approximately 240g ◼️Material S50C ◼️Remarks 3 R-shaped sections Diameter error finished to ±0.03mm Edges are carefully chamfered. It will be wrapped in a rust-prevention sheet and carefully packaged for shipping. Although the size is different, a previous buyer was delighted, saying, "It's beautifully finished and I'm very satisfied." Please check the images and purchase with your understanding. Please take a look at the other plates I have listed as well. Parts...Metal parts Material...Metal/Metal Details...Alloy Usage...Metalworking/Engraving