After reading the reviews, i was afraid this would break when using this so i purchased this at my local hardware store. For what i needed to use this for, was to drill a 1/2 hole to fit some speaker wire thru. I used my cordless drill and ran it for full speed for a few minutes and didn't hear any noises from the unit even after going thru a 2x4. The unit worked for my expectations.I am giving it 1 less star as the little magnet did come out with the attachment when i was done with it. Took me a few minutes to get it back in there so not sure if it had some glue to keep it there but i can see this being lost very easily.As this is the first time I've needed to use a right angle type drill, i most likely will not use it that much but will surely keep it in my toolbox for those hard to reach screws.