A single-point cobalt countersink with a conical cutting profile that machines a chamfer at the mouth of a drilled hole. The cobalt construction holds an edge longer than plain HSS when working harder or abrasive alloys.Key specs Material: Cobalt Diameter: 12.4mm Compatibility / fitmentFits standard drill chucks or Weldon-shank arbors, per shank type shown.Application / use caseThe 12.4mm cutter suits smaller-diameter chamfering work such as countersinking clearance holes for flat-head screws or deburring drilled and tapped holes, while the 25mm version handles larger-diameter bolt clearance holes or bulk deburring on heavier fabrication work. The cobalt edge is best suited to stainless steel and other tougher materials where a standard HSS countersink would dull quickly.
