This is a good set of useful size Forstner bits at a great price. These are simple steel drill bits that will need sharpening after heavy use - there can be dozens of holes in pine, but only a few holes in OSB or something very hard and abrasive. Mine had clearly visible burrs on many of the cut edges. After taping the edges to a wooden spatula with 320 silicon carbide paper, the bits held up fairly well. However, due to their rough edges, they may not give great results. Please note that theβ¦