Armeg Professional Masonry Drill Bit for masonry drilling using a 3 jaw chuck machine. Straight shank design manufactured to PGM standards for a secure fit into 3 Jaw Chucks, European sourced high alloy steel ensures strength and durability. Proven flute geometries enable maximum spoil removal, speed and penetration rates. Copper brazed to 1100°C furnace brazing process uses a copper braze to 1100°C giving the ultimate bond between body and tip, allowing the drill bit to withstand greater pressure and produce a greater number of holes. Percussion grade carbide tip is specially designed with sharper angles specifically for percussive drilling, providing extended life in masonry materials. Professional masonry drills be used in Heavy duty concrete, general concrete, hard bricks, soft bricks, lightweight blocks, natural stone, constructional granite and limestone.