Solid Carbide Drills DDC Solid Carbide Drills - 30×D (for Deep Hole) 內冷深孔鎢鋼鑽頭 Product Specs P M K N S H . 30×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 DDC03003001 3.00 100 140 3 DDC03503001 3.50 136 176 4 DDC04003001 4.00 136 176 6 DDC04503001 4.50 168 208 6 DDC05003001 5.00 168 208 6 DDC05503001 5.50 200 240 6 DDC06003001 6.00 200 240 6 Drilling C019