These are fully refurbished to like new condition. Custom upgrades are as follows. Ceramic Ball Bearings on slave & master beater driveshafts. Stainless Steel Ball Bearings. In slave & master pedal heel plate. New pedal Cobra Coils fitted to slave & master pedals. Chains rejuvenated then oiled with Wax Lube self-cleaning racing bicycle chain oil. New chain felt on beater cams. Rubberized top & bottom master pedal hoop clamp. Velcro added to slave & master pedal plate for extra grip. Custom Red Foot Boards. These pedals are Amazing! Smooth and super fast!