11-Piece Bi-Metal General Purpose Hole Saw Set - Perfect for Wood, Metal & Plastic Cutting (Drilling, Construction, DIY Projects)

I absolutely love these bits. I've bought this set, the smaller set, and a 6" bit. These literally eat through wood. They are fast, and lock in securely to the provided bit collet the quick release bit makes it easy to remove the cut block. I wish I could say more about how great these are. Highly recommended purchase.