1.We are factory 2.Size:6,8,12mm and 1/4,1/2" 3.Material:45#, ... shank are availableDifferent packing are available 2.Size Shank for 6,8,12mm and 1/4",1/2" 3.Router Bit ... bit, concrete Hole saw and related products. 5.Company Picture 6.Certificate Tungten Carbide Router Bit For Engrave(Corner Rounding Bit)