Sapphire burnishing tool (EMS)

This tool outperforms any stone for fine burnishing of soft or hard materials such small pivots, shafts, and pins made of hard steel, carbide, and even ceramic.

This finely honed sapphire blade is 1.5mm x 2.3mm and is 14mm long. It is fixed in a hexagonal gold anodised aluminium handle. The overall length is 120mm.