Acme Propellers are a precision machined prop that revolutionized the propeller manufacturing and the tournament boat industry. All Acme Propellers are 100% CNC machined. The computer numerically controlled (CNC) milling machines provide an extremely accurate and consistent means for removing metal. This method of production, relative to hand-finished, translates into Acme Propeller perfection, and the elimination of one big variable in boat performance. If you are looking for a replacement or are upgrading your waterski boat, wakeboard boat or wakesurf boat you should not look any further.