ITEM NAME:0.8mm Tungsten Steel Micro Carbide Engraving Drill Bit PCB For X10 PC MO Description: 10pcs 3.175mm Tungsten Steel Milling Cutter Bits End Mills for Drill Hole Specification: Shank diameter:3.175 mm Blade diameter:0.8mm Total length:38mm Material:Hard alloy (tungsten steel) Feature: High hardness, high wear resistance, high strength, resistance to bending, resistance to wreck. Bit chip space is large: small chip resistance, smooth, little heater of drill, reduce pollution of drill; Extraordinary cutting edge sharpness: As a result of nanotechnology and advanced grinding technology, bit more sharp cutting edge than before, can reduce the cutting force, reduce the broken drill rate, improve the hole wall quality; Cutting edge strictly symmetrical: beneficial and efficient cutting, avoid offset drilling. Package included:.10pcs 3.175mm Tungsten Steel Milling Cutter Bits End Mills for Drill Hole. Material:Hard alloy (tungsten steel). Bit chip space is large: small chip resistance, smooth, little heater of drill, reduce pollution of drill;.