1/8" Shank End Mills Cnc Router Bits, 40Pcs, Cnc Cutter Milling Carving Bit, ?What you will get?1 set 2-Flute Flat Nose Sprial Bit(3.175x17x38mm), 1 set 2-Flute Ball Nose Sprial Bit(3.175x2x17x38mm), 1 set Titanium Coat End Mill(0.8-3.0mm), 1 set Nano Blue Coat End Mill?0.8-3.0mm??totally 40pcs CNC Router Bits ?The 2-Flute Spiral Flat Nose Ball Nose End Mills: Shank Diameter: 3.175mm(1/8inch), Cutting Diameter: 3.175mm, Cutting Length: 17mm, Overall Length: 38mm.(Note: The Ball Nose End Mills's cutting diameter is 2mm) ?The Coat End Mill: Shank Diameter: 3.175mmm(1/8inch), Cutting Diameter: 0.8 ~ 3.0mm (0.8/1.0/1.2/1.4/1.6/1.8/2.0/2.2/2.5/3.0mm), Cutting Length: 17mm, Overall Length: 38mm, with Nano blue and Titanium yellow coating. ?Excellent Performance: The milling router bits as a whole uses tungsten steel for high-precision processing, smooth chip removal, with high precision, durability, not easy to wear, long service life and so on, they will be a nice carving Tool?greatly improving your engraving work efficiency. ?Applicable materials and uses:These engraving Bit can be used in a wide range of materials including solid wood, wood paneling, bakelite, carbon fiber, PCB boards, and plastics, etc. And the bits measure 3.178mm (1/8inch) and are compatible with most benchtop CNC machines and engraving machines such as the 3018 series as well as other industrial CNC machines.