I think Hazet have a lifetime warranty on their hand tools, although the cost of shipping the damaged tool to Hazet may well outweigh the cost of just buying a new one.
I dont think you'll have any issues with just breaking normal sockets, i wouldn't let the lack of easy warranty put you off them.
Hazet has a limited lifetime warranty that protects from defects, with some exclusions. And we would be happy to take care of any Hazet issues that come up, so you wouldn't have to go directly to Hazet. More information is here:
