GRS 022-452 Round QC Graver HSS EUR N-6, USA QC-52, 0.6mm. his Round a wider flat top, a narrower rounded bottom, and flat sides that angle down. A Round can be used for bead raising, block lettering, engraving on uneven surfaces, and line engraving. Use with a Traditional QC Tool Holder (#004-803). Precision made from high-speed chrome tool steel.