This tool will out-perform any stone for the fine burnishing of soft or hard materials such as; miniature pivots, shafts, and pins that are made from hard steel, carbide and even ceramic.
Precisely ground sapphire blade is 1.5mm x 2.3mm, 14mm long (0.06x0.09x.56"). It is permanently mounted in a hexagonal gold anodized aluminum handle. Total length is 120mm (4.75").