Cheap at twice the price

This chuck (which I consider to be essential) greatly enhances the convenience of any Dremel. You might be tempted to save the old collet device this chuck replaces, but before long you will discard it as useless trash. I do a lot of really miniature work and I find the chuck to be great for holding things as small as a 1/64th inch drill. I have one on each of my 3 Dremels.