Drillzone 5pcs 5 Flute 82/90 Degree Countersink Drill Bit Set Counter Sink Chamfer Bits 5 Flute Countersink for chamfering and countersinking. Countersink Tool Bit Set Counter Sink. Cut cuickly and easily in wood, soft metal, rubber, plastic and other machinable materials. For carpentry, locksmiths, automotive, metal working. Perfectly centered holes every time properly seated screw heads.