The Kizer Superbolts are very low volume mounting screws made for hex/allen keys. In case you strip the hex, it's got another socket around it that can be accessed with a wrench, so it can be still opened without problems.
Made out of the best Chromoly steel available and heat-treated to perfection, these bolts are made to withstand abuse.
Available in 3 lengths: 12mm, 15mm and 18mm. Sold individually.