Solid Carbide Drills DZC Solid Carbide Drills (for Step hole) 內冷階梯鎢鋼鑽頭 Product Specs P M K N S H . Reinforced Shank . Internal Coolant . UNIX Coating . Tolerance h8 ● ● ● ○ . For drill with a counterbore, countersink, or chamfer. . Customizable . For Steel, Alloy Steel, Stainless Steel and Cast Iron. Unit:mm Order No. D L1 L2 L Ds Order No. D L1 L2 L Ds DZC03300301 3.30 12 26 62 6 DZC04200301 4.20 15 28 66 6 DZC05000301 5.00 18 36 79 8 DZC06800301 6.80 24 48 90 10 DZC08500301 8.50 30 55 102 12 C044