I love this thing. I bought two sets. I've been struggling with these steel collars trying to tighten these bolts that always come loose when I try to tighten them enough. Or the clutch is so tight because the drill bit size is between two clutch sizes. Well these two sizes cover 99% of all drill bits I use when I need to control depth (less than 3/8 inch). smaller size). I've used the little one the most, maybe 20 times, and it's still holding up well. Easy to install and to my surprise it stays in place. Space requirements can prevent you from setting an adequate drilling depth if your drill bit isn't long enough or the hole you're drilling isn't deep enough for me (hinges, mounting holes, etc.) on wood projects so far I'll keep the set in reserve and never again using those horrible steel clips and screws for stripping.