I use a cheap digital one, purchased from that known auction site, that looks EXACTLY like the digital one mentioned above by Roy from Pa. Mine measures up to 40 Kg (close to 90#), and can give readings in Pounds, Kg and something else I don`t remember. It can also hold a highest reading for a few seconds. And it was very cheap. I do not have another one to compare it to, but I tried to calibrate it using measured liters of water (1 liter=1Kg), and could not find a measureable error worth mentioning. Mind you, if it is accurate to +- 5%, and repeatable, it is good enough for what I do. And Roy from Pa is right about another thing: the hooks are not helpful, especially the closed loop above.
DF