Overall length (L) is 75mm from bottom face of head. M10-1.25p thread length (b) is25mm with the rest being plain shank. Titanium drilled hex flange front brake / radial caliper mounting bolt kit. We have caliper bolt kits for most makes and models and will also make up bespoke kits for you, so if you are building a special and have different calipers we can mix and match sets for you.