Specification: 1.Item No:ST0305 2.Diamond Stone Burrs 50pcs/set 3.shank dia.3mm 4.grit:150 ... workshops: 1. Workshop 1: diamond electroplated products: diamond burrs, diamond files, diamond stone sharpeners, diamond electroplated cutting discs, diamond grinding discs, diamond resin grinding wheels, etc. 2 ... DIY tools to Japan, Germany, the USA and Australia Diamond Stone Burrs dia.3x50pcs/set 150#