This modern Mast track Base is ideal for the newest design race boards that feature sliding mast track systems. This version has a track pin bottom and a Euro Pin top to work with EP base extension systems.Features:Modern mast track pin lowerChafe pad to minimise damage on the board as the sail is being rotated.Large metal washer under pins for increased durability by preventing point loading.Low profile design – for optimum control.High Quality tendon used by most high level professional sailors.Euro Pin upper – works with modern EP base extensions.* Special note -The EP upper pin – IsNotCompatible with the modern Bic Auto mastfoot Upper – EP. #BP30648 (doesn’t lock into Upper).