ITEM NAME:3PC1/4 Hex 5Flute 12-19mm Countersink Drill Bit for Wood Metal Quick Change #gib Store Home Promotion Hot Item Add to Fav.Five Flute Chamfer Debur Countersink. Carpentry Countersink Drill Bit Set. 3pcs Countersink Drill Bit Set Chamfer woodworking Chamfering drill. 5 Flute Counter Sinks. size:12mm 16mm 19mm. New arrival.