If you're expecting this to be a high quality Amana bit, you'll be disappointed. These knives were sharp and good looking. If not overheated, they cut well, especially new ones. I cut 1" x 2" deep grooves into 80 floating shelves with 2 bits. To be fair I quickly pre-drilled through the material and then erased the slot using these bits and a template. If you treat these beats with a little care, they're a great thing. 3 bits for 1/3 bits of the Amana template. I also have Amana