I'll update my review: The 1/4" bit broke on the second pass. Luckily I wore glasses. Should have spent the money on a good piece. Kinda freaked out. I knew they were cheap but didn't expect them to break the first time I used them. Original Review: Received my set and measured the bits. I have two 1/2" bits and no 3/8" bits but not worth returning because they are so cheap. Effortlessly slices Dado into 3/4 inch slices. Let's see how long they last, but the price doesn't bite.