The 5 X 7 course description holder is designed to clip onto any style handlebar to hold the course description charts from the guidebooks. It does not hamper steering, nor get in the way. It is an easy way to reference mileage, descriptions and waypoints while on the fly. This is highly recommended for a safe and simple way to use the guidebooks. It is well worth its weight for such a low price!

Extra Benefit:  It's also a super great place to stash things you want easy access to while riding like a tool for suspension adjustments, cloth for wiping your goggles, stickers to hand out to kids, change, etc.  it unclips in 2 clicks and can be carried with you, if needed.