◆ MASONRY DRILL ◼ Chracteristics : The speedy percusson-purpose Drill for drilling the concrete ◼ Features : 1. Holes are speedily made, because percussion-purpose Drill transfers its power of percussion and turning direct to the edge of blade. 2. Its edge of blade uses the excellent TC tips in endurance and can break / cut the stuffs into pieces by turning. The exclusively designated blade-edge shape and angle of blade enables it to have the excellent endurance and cutting. 3. The stuffs of drill bit uses alloy tool steel in the range of 2.8mm~4.5mm and carbon tool steel in the range of 4.8mm~9.5mm, so that it can endure the shocks in drilling. You can choose 3mm~20mm in the diameter of blade-edge (4.3mm~20mm in case of long type), 80mm~300mm in full length for various purposes. ◼ Usages : Drilling of concrete, moldings, brick marbles, bricks, tiles, plaster board. Proper RPM of the electric drill 3~5 / 1800 ~2300 RPM 4~7 / 1200 ~1800 RPM 7~11/ 800 ~1300 RPM 11.5 ~20/600~ 800 RPM 21.0 over / 600RPM below ◼ PRODUCT SPEC : OUT DIA(mm) BLADE LENGTH(mm) OVERALL(mm) 3 45 80 3.5 45 80 4.0 45 80 4.5 55 90 5.0 60 95 5.0 110 160 5.0 200 250 5.5 60 95 5.5 110 160 5.5 200 250,300 6.0 60 100 6.0 110 160 6.0 200 250 6.0 250 300 6.4 65 105 6.4 110 160 6.4 200 250 6.4 250 300 7.0 70 110 7.0 110 160 7.0 200 250 7.0 250 300 8.0 80 120 8.0 150 200 8.0 200 250 8.0 250 300 8.5 85 125 9.5 95 135 9.5 110 160 9.5 200 250 9.5 250 300 10.0 100 140 10.0 150 200 10.0 200 250 10.0 250 300 11.0 110 160 11.0 150 200 12.0 110 160 13.0 110 160 14 110 160 15 110 160 16 110 160 17 110 160 18 110 160 19 110 160 20 110 160 22 110 160 24 110 160 26 110 160 ※ Size out of SPEC : produced by order