This product is a set of 2, containing 4 pieces. These are parts for replacing the sticks with TMR sticks. Theoretically, sensor malfunctions (drift) caused by dust will no longer occur. Disassembly of the controller and simple soldering are required for installation. Please note that you may void your official support if you disassemble your controller. Important Notes: We cannot confirm the operation after installing the product. Please understand that returns are not accepted to prevent swapping, etc. Gently bend any slight bending of the legs during shipping back into shape with pliers. Malfunctions due to bent legs generally do not occur, but they may make it difficult to insert into the board.