30mm Diamond Parallel Fit Electroplated Drill Bit

75mm long metal drill bit with diamond tip. For use in manual drills. Parallel fit type. The unique electroformed diamond glass drill has a tremendous number of advantages over other types of glass drills. Some of these advantages include a thin wall of the tube which allows glass to be cut very fast leaving a very good clean hole. The diamond impregnation depth of a standard and thick wall drill is 12 mm. These drills are designed and manufactured to cut a large number of holes in glass, ceramics and similar materials giving very good life.