*6mm shank
*Slotted taper and deburring countersink for burr 
  and chatter-free deburring and countersinking. 
*Made from 90¢X HSS CO5.(5% Cobalt Content ) 
*Through slot chip removal prevents chips 
  from clogging in workpiece. 
*Gives best results at low cutting speeds in steel, 
  cast iron,non-ferrous and light metals.