... Delivery,within 5 daysBurrs is a new kinds of milling cutter, it can be used to processing ... better.Cylinder(Type A)Specification of carbide burrs:Head Diamenter 1/2", Lenth of cut 1"Shank Diamenter 1/ ... 4", Length of shank 11/2" ... hand cutting action gives excellent control of the burr and grinder,, dental bur,a series of solid dental burrs