The Amana PS 200 2 Piece Carbide Countersink is a game changer in the industrial drill bits category! Based on our own experience, it delivers precise and clean cuts even in tough materials such as steel and aluminum... The carbide construction ensures durability and longevity, making it a valuable investment for any professional workshop. The only downside we found was the price, which might be a bit steep for some budget-conscious buyers. overall, highly recommended for anyone who needs a high-quality countersink bit..