Description: 10pcs Brand New Unused Carbide PCB CNC Drill Bits replacements for your CNC machines and any Handheld tool: Dremel, Jewelry, these long-lasting bits are made from high quality tungsten steel for a precise, easy experience. It is brand new with best quality from the professional factory. Great for PC Boards, Plastics, Fiberglass, Wood, Soft Metals, etc. Shank diameter (SD): 3.175mm 10pc Cutting edge diameter (CED): 0.3-1.2mm (Inlude :0.30mm 0.40mm 0.50mm 0.60mm 0.70mm 0.80mm 0.90mm 1.00mm 1.10mm 1.20mm) Total length: 38mm Package include: 1 x 10pcs Carbide PCB Drill Bits