Easy to use... Convenient. I bought the dewalt brand and you have to use a specific bit for those as with other brands of bit holders. These you can pretty much use any bit with it. I use them for small assembly work, I gave one to my coworker and I notice he uses his all the time, my only gripe so far is sometimes they will fall off your bit, but I use them all day long so I'm not too peeved about it