I picked up a set of these soft brushes as well as a matching set of the hard bristle brushes to use on some jobs around the house. Man, did these speed up some tedious chores! It's nice that this kit gives you 3 different options (a large flat puck, a smaller flat puck, and a large 3D cone), which allows you to reach and clean tight spaces. The 1/4" bit is pretty standard with today's power tools, so there should be no worries as to "will this fit my tool?".So far, I've used these soft brushes on cleaning speaker grilles, tough-to-scrub bathroom ledges, and interior car spots. They are holding up quite nicely. I recommend cleaning out the brushes after each use, as you don't want the soft bristles to hold onto any debris for the next job, potentially scratching your surface. Their build quality feels decent and I suspect these will last for many jobs in the future. This, of course, assumes that you don't press down super hard and crush all your brushes when in use, but hey, sometimes you really gotta get in there. If you are going to be using these on heavy duty jobs, the price is reasonable enough that you can probably afford to buy a backup set to have on hand. I would buy these again in the future if needed.