I used these to install a gutter guard and a bad review about the Milwaukee bits I've used had read. Since they broke sometimes, I tried them based on the reviews. They were much worse and often broke. They are also not very suitable for some exercises because they cannot be tightened enough and they slip off. I returned to popularity in Milwaukee 48-89-4602 5/64 in. 2pcs SHOCKWAVE titanium drill bits fixed in the drill bit and last much longer than this product.