Product Description Tungsten Carbide Twist Drill 1) Non-standard products custom accepted. 2) Suitable for Mould steel, Cast Iron, Aluminum alloy, Copper, and Alloy steel processing, Mainly for fixing point and chamfering before drilling the hole for the workpiece 3) we need know detail size or drawing, material or cutting metal about your need drill bit. If you are interesting our product, please contact us!Outside diameter(D) Overall length(L) Flute length(l) 0.5-0.7 30 6 0.8-0.9 30 8 1.0-1.1 30 10 1.2-1.4 35 12 1.5-1.7 35 16 1.8-1.9 40 16 2-2.4 40 18 2.5-3.0 40 20 3.1-3.9 50 25 4-5 50 28 5.1-6 60 30 6.1-7 60 32 7.1-11 70 38 11.1-12 70 38 12.1-14 80 40 16 80 45
