Masterline Pro-Tect Custom Water Ski HandleMasterline Pro Tect Custom Water Ski Handle The Masterline Pro Tect Custom is a tournament slalom water ski handle used by many of the world's top slalom skiers. The bar runs a smaller diameter but stronger aluminium core, leaving more rubber between your hands and the metal for a more comfortable grip under heavy line loads through the course. Specially formulated rubber wraps the bar, strung up with 3 8" Polypropylene rope to the pros' specs. Open