As a product, the drills themselves look very good.. I use them on plastic, so I imagine they don't wear out as much as with wood or metal, so I can't judge their durability in practice with such little use so far. The complaint and minus one star is for the case that either came "shaken" or is not very durable, so with the large drill on top, it simply closes the lid, it doesn't stand open to do your work and it's really annoying.. also, they could be MUCH cheaper (judging from a similar product I found after ordering)