The Dura Road Pad is a forged aluminum holder with dual pivot adjustment that houses Koolstop`s Dual Compound Dura Type insert and comes with an extra pair of their aggressive salmon compound inserts The Dura Road Pad is a forged aluminum holder with dual pivot adjustment that houses Koolstop`s Dual Compound Dura Type insert and comes with an extra pair of their aggressive salmon compound inserts 55.5mm pad works with most Shimano type brake systems Water grooves and patented plow tip