Watch Repair Tool Polishing Stone 100mmx50mm for Sharpening Screwdriver W5298

Watch Repair Tool Polishing Stone 100mmx50mm for Sharpening Screwdriver W5298

Applicable to hardened chilled steel, alloy steel, precision steel, glass, porcelain and quartz etc.

The Ruby Sharpening stone is made from sintered crystals of synthetic ruby;

It is extremely hard, maintain their shape well and are resistant to wear;

Specification：3000 grits

Size: 1 0mmx50mmX12mm

Package included：1 piece