Was having a bit of a peruse of Dremel accessories down at Masters, and came across the keyless Dremel chuck. Sounded like a pretty convenient idea – instead of having a number of different collets, you can change your Dremel so changing between bits is toolless, and it doesn’t matter if you are changing between different shaft diameters. Also means you can use small drill bits without having to purchase ones specifically for Dremel.
The original system does work, no question about it. But it could be more convenient, and toolless bit changing has a certain attraction.
When you take the chuck out of the packet, don’t expect it to work exactly like a spare chuck for a drill/drill press. It needs to be mounted on the Dremel to work – as it screws up and down the shaft thread it opens and closes the jaws. Solid little unit, and doesn’t crush like the aluminium collets of the original system when they get stuck in the shaft of the Dremel. It may not be for you, but always good to know these sorts of things are out there (and at $20, it isn’t too impacting on the wallet).