Mobility and Daily Living Aids Baseline, Health & Household, Medical Supplies & Equipment, Mobility Aids & Equipment Baseline 180 Degree Extendable Leg with Magnification, 9-26 Inch Review by RoomPony June 15, 2018 No Comments 180 degree extendable legs (9-26 inches) with magnification Extendable goniometer offers easy-to-read scale Adjustable leg length for measuring large and small joints More Baseline 180 degree extendable legs (9-26 inches) with magnification.