When it comes to rotary tools, nobody has really come close to Dremel. We wouldn’t call it a monopoly, either — there are quite a few different rotary tool kit creators out there who have attempted to compete with them but continue to be dominated when it comes to the overall quality and price points Dremel gives us. The user reviews of their tools don’t lie, either. Today we took the time to review one of their most popular high-performance rotary tool kits, the Dremel 4000-2/30. Let’s check out some of the main features and specifications and why it’s rated the #1 rotary tool kit in the market today.