Set includes all 4 titanium bolts for the lever clamps of Hayes Dominion brakes. These are available in both button head and socket head. The socket head gives a bit deeper bit interface to resist stripping as the original Hayes pan heads are very easy to strip. With this though, the socket head is slightly smaller in diameter than the button head so you may need to use a sharpie to touch up the paint in the spot where the button head rubbed before (if that bothers you). 
 
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