Got thur 900 wire ties before it pulled apart.these were lightweight and made of plastic not good quality.Threads pulled out the first time we used it looks like the hole in the casting on the hook was too large not allowing the tap to thread the hole correctly.It was possible to get the spring to wind up every once in a while, but mostly it did not, and one had to turn it as if there was no spring. Not so very impressive.Hook came off on first couple of useWas not happy with this at all get what you pay for. Broke on first tie went to my local hardware and bought there’s for fourty dollars works greatOne came broken. They use plastic threads, which aren't strong enough for the work. We couldn't stop work to return, so we just used one.