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104 ISCAR GENERAL PURPOSE DRILLINGDrill BodyThe DR drill body was designed with twisted coolant holes that pass through the drill flutes. This design leaves more room for the chips to flow out of the hole uninterrupted. The coolant holes do not pass through the center core of the drill; therefore, the drill is stronger and more resistant to torsion. A clamping pocket was designed to set inserts at a specific angle giving the right balance to reduce vibration and cutting force.The DR drill body is made of steel, featuring a body hardness up to 55 HRc and hard touch nickel coating for better wear resistance and smooth chip flow. DR-TWIST drill bodies are available in drilling depths to diameter ratios of 2xD, 3xD, 4XD and 5xD and in a diameter range of 12 to 80 mm (for more details please refer to catalog). The drills are available in whole metric sizes as well as half sizes in the above-mentioned range. The DR-TWIST Line Contains 3 Types of Tools %u2022 DR-%u2026-N for general applications, providing phenomenal results.