Breynet 5pcs 5 Flute Countersink Drill Bit Set 82 Degree Five Edge Chamfering Chamfer Cutter for Wood Plastic, Tri-Flat Shank Quick Change Bit Deburring Tool Set 1/4, 3/8, 1/2, 5/8, 3/4"

The case and bits were looking good. I tried one on soft aluminum rail for router table. It become dull after about half of one countersink. Returning. Purchased single bit instead of set. It made by Vermont American, 16634 High Speed Steel Countersink, 1/2-Inch. Used on couple holes. Still sharp.

Excelente herramientas ..