High quality diamond grinding pencil for working very hard metals, glass, ceramics, fire-proof materials etc. The galvanised coated metal pencils can be counted on being hard & resistant to abrasion. The tools cut well because the diamond particles are located evenly over the fixation. 5 piece set with one of each grinding pencil: * Cylinder shaped * Pointed arch shaped * Round * Pointed cone shaped * Cylinder point shaped Supplied in a plastic box.