When the E-Z Knees are fitted to your fenders, they pre-turn your oxbows around so you don't get twisted, painful knees! "Stop the fender fight and relieve unnecessary pain in your knees and hips while you ride. E-Z Knees uniquely changes the position of your western stirrups to sit perpendicular to your horse. This allows your feet to rest in a more natural position which can help eliminate pressure from the "fender torque". Constructed with 1/8" hand polished aluminum, they are rust-proof and durable." The EZ Knees will add 7cm to the length of your fenders. Available in 2.5" or 3" to accommodate the width of the bottom of your saddle's fenders (straps).