The new 2.35 mm Round Blank graver from GRS is made from Glensteel, a special high-speed steel. Glensteel wears predictably, resists breaking and chipping, and is an excellent choice when a tough graver is needed. GlenSteel is cobalt-free, eliminating the concerns of cobalt exposure during tool sharpening and use. Glensteel 2.35 mm Round Blank gravers use QC Tool Holder for 3/32" Round #004-853.