The Fox Float X2 and DHX2 rear shocks in Factory and Performance Series Elite have independently adjustable low speed compression, high speed compression, low speed rebound and high speed rebound. This small, handy tool gives you the ability to easily change any of these adjustments on the trail. This tool is especially useful on frames with tight clearances that make it difficult for a normal multi-tool to reach. Also, it&';s small size just makes it easier to carry along with you instead of a bulky multi-tool if you prefer to pack very minimally.