ITEM NAME:2 Pieces-Professional CNC Router Bit Mill Description: Using for hand-making or woodworking 2 Pieces Industrial Quality Router Bits 8x17mm The is made of high quality tungsten steel alloy forging , body is made of titanium steel material(HSS) Build-up & Heat Resistant Coating Baked on heat resistant coating prevents build-up of sawdust, resin, and pitch. Industrial grade micro grain car.Shank Diamter: 8mm( 5/16"). Baked on heat resistant coating prevents build-up of sawdust, resin, and pitch. SKU: DMO0014249119443724. The color may have different as the difference display, pls understand.