I am a construction equipment mechanic and these have held up fine so far. The case is super nice to have, it keeps them all in one place and for a field tech these would be ideal. I am now in the shop, but they still fit fine in my box. i got tired of looking for the right socket in the shop tools, and these fit the bill just fine. I have put 800 lb foot on the 1 1/2 and 600 on the 15/16 both with torque multipliers and they have done fine. I have used the 3/4 gun breaking cylinder rod nuts loose just fine. I think these will fit for most people looking for a set, and some tool trucks have these on them, so you may be able to warranty them there.