We will be happy to produce you a custom "Doubled ended" square drive cable for older Enforcer boats or home-built models. In order to qualify for a DE cable, both the engine / clutch PTO as well as the Ferrule at the prop shaft end must utilize a 1/4" female square opening. The standard price above is good up to 18" overall. Please choose thecorrect options for longer cable lengths. If your boat meets these requirements continue to the specifications section where we will walk you through properlly measuring for a custom made cable.