This is a service option for 3D24 and 2INpower cranksets in case of a broken, damaged, or removed DTT pinch bolt on the non-drive side crank arm. To select this product, you must first speak with a ROTOR representative. The cost covers parts and labor. The customer is responsible for shipping the damaged parts to our office. Please do not send us the cranks until you have spoken with a ROTOR representative and received an RA number.