BikeFit Forefoot Measuring Device - FFMD. The Forefoot Measuring Device (FFMD) is placed on the bottom of the foot to help gauge forefoot tilt and determine the number and angle of Cleat Wedges and/or ITS Wedges needed to accommodate the cyclists varus or valgus feet.Made of stainless steel it measures 5-3/4" in length to 8-3/4" when extended