I did have a look at the ToolBox site, but not with regards to information only as a possible place to purchase one from. Dig deep and you can find spare sets of contact kits that they sell for the various contractors, the one that we commonly use for our winches appears to be the DC88P. If you have a look at the 8 page data sheet for the contractors there's a graph that suggests that the genuine Albright contractor contacts should be capable of handling 500amps for about 45 seconds and a breaking current of 800amps!!! I think that the damage is done when making and breaking the contacts when winching once already under load. The photo of the contacts in the Albright contact kit look identically to the ones that I've just removed from my Chinese copy one and why wouldn't they?!