This is my first time using vix bits but I've tried doing many other things with countersinks and drill bits to replicate, what a little vix does and those things are great. If you've bought tools before, you'll immediately be able to tell the difference between a cheap tool and a well-made one, and it's really good. Some reviewers claim the spring is too tight, but I think that's right because we use this spring to support the weight of your drill or screwdriver. The quality of the build materials used means this tool won't scratch any hardware you're trying to sink. Overall, this is a great tool that is worth every penny spent.