I have several sets of countersinks and, apart from limited space, I prefer the following: 1. You can hold the bearing (it's easy enough) to ensure that it doesn't spin or leave marks on the wood.2. Depth adjustment is simple and easy to adjust.3. A reasonably sized hex is used to adjust the depth, unlike the other fancy set that uses micro screws that snap off. The racket is held firmly and cannot slip. Also a problem with my other set.5. The carbide bearing can spin and leave marks on the wood if you don't do it right, but if you do it quickly it will stop quickly when it first touches the surface. You can also hold it for a while. Once it's on the surface, don't turn around and mark it.