2 pieces. A drill with a diamond-ground carbide tip with a patented centring tip for highly accurate start positioning and exact holes without break-outs. With 10 mm shank. A carbide drill for use in standard drill chucks. With 1/4 inch (E 6.3) hexagon shank.
For very hard stoneware tiles up to Mohs / scratch hardness class 9 and for glass and porcelain.
Not suitable for hammer drills. Maximum spindle speed 200 rpm. No cooling required.