Sick of the split pin on your shimano (or magura) brake caliper? Here's a retaining bolt to use so your pads are more secure and changing them is easier. 

Shimano note:

These are only compatible with Shimano calipers that have a thread in the casting for the bolt. The thread is located on the outboard side of the brake caliper as illustrated by the photo below. If you have the thread you can use this bolt.

Also note that these bolts also fit shimano "road" brakes (ultegra etc.). The standard bolt that comes with these brakes is slightly shorter and has a flat-head drive but these bolts also fit and it's much nicer to use a hex head bolt.

Magura note:

These can also be used on Magura MT5 and MT7 calipers. Here's a photo from a fantastic customer, Jacob, which shows what that looks like on an MT5.