Is anyone familiar with a set of two jaw pullers that actually hold up. I have bought some very expensive ones, but the jaws never seem to hold up on them. I have to put a big c-clamp on the ones I have now to keep them from coming off when I put any pressure on it. I don't use them for anything really tough, mainly pulling stuck on blade adapters and pulleys off of crankshafts on commercial/residential mowers. Thanks