I've actually sheared a bolt off in the aisins and had to EZ out it out. I then switched over to allen head capscrews which have a larger area on the head so if the internal hex gets rounded out, you can use visegrips to still remove them. They are also rated for more torque than what comes with the stock Aisins. It's a cheap upgrade I really recommend it, especially for anyone who wheels far from home at all. I'm also in agreement with Aisins being the best choice for a non-fuse system. When I researched my hubs, it was the general consensus that strengthwise aisins were the strongest. However, if you do break one, I seriously doubt aisin is going to have replacements sent out to you for free.......