GRS Q C Onglette Gravers | These HSS gravers are pre-cut and ready to use. The working ends of these gravers are pre-cut and polished by hand to match examples from a professional master diamond setter and engraver. The tang has also been pre-cut to fit into the ingenious GRS quick-change (QC) graver holders, which pop right into the GRS graver holder handle. You can also use them in regular wood graver handles. These gravers are ready to go to work right out of the package, All you have to do is keep them sharp.