Dremel

The tool performs exactly as required and it it easy to use. This is consistent with other Dremel products I have owned.

Usable But Not Perfect

An adjustable drill chuck for the Dremel power tool is a brilliant concept. Unfortunately the manufacturing precision is less than brilliant. I purchased the chuck for diamond drilling my wife's quartz crystals and gem stones in a water bath. The chuck jaws are eccentric (out of true) and a 1 mm diamond drill tip actually moves in a noticeably larger circle. This makes it difficult to start the drill in a hard surface and also causes water to be splashed about when drilling. I have owned large drill presses which are much closer to being true than this chuck. It might work OK for softer materials but I don't understand why it couldn't have been manufactured true in the first place.

simple and handy

fits my dremel 400 xpr just fine and makes changing bits a lot easier