ITEM NAME:1/2'' Shank - V Groove Router Bits CNC Engraving Woodworking Cutter Tool Description: - Router CNC Engraving Wood Working Bottom Cleaning Bit - 1/2" or 1/4'' Shank - Industrial grade micro grain car.Made of high quality tungsten steel alloy forging blade and titanium steel material. - Shank Diamter: 12.7mm( 1/2"). As different computers display colors differently, the color of the actual item may vary slightly from the above images.