Review on Dremel 4485 Quick Change Collet by Robert Layne

Dremel is the cheapest rotary tool but Dremel accessories are generally of higher quality than fakes. And they are no exception. I noticed that some of the negative reviews say they break easily. Collets tend to break if you use the wrong size. The collet is not a chuck and cannot hold the wrong size tools. If you use the wrong size collet, it will BREAK when tightened. It may look like a cartridge, but it's not a cartridge. The chuck is a universal size and the collet is a universal size for a system. Collets are superior to cartridges, but you need to know when NOT to use a collet. For example, do not use a drill collet as 99% of drills are the wrong size for a collet. And if the collet is overtightened to match the drill bit, the collet will deform, causing it to operate off-center and causing deflection, ruining the collet's accuracy and life. If you break collets, you are not using them properly.