Solid Carbide Drills DDC Solid Carbide Drills - 40×D (for Deep Hole) 內冷深孔鎢鋼鑽頭 Product Specs P M K N S H . 40×D Cutting depth . Reinforced Shank . 135° Tip Angle . Internal Coolant ● ● ● ○ ○ ○ . UNIX Coating . Tolerance h8 . Double Margins Design . SX Design . For Steel, Alloy Steel, Stainless Steel and Cast Iron. ※ DDC drills require an initial pilot hole to guide the drill. Unit:mm Order No. D L1 L Ds Order No. D L1 L Ds DDC03004001 3.00 130 170 3 DDC03504001 3.50 153 193 4 DDC04004001 4.00 176 216 4 DDC04504001 4.50 198 238 6 DDC05004001 5.00 218 258 6 C020