Features a Splined-core and specifically designed for complex and/or long cable runs. Easy movement Minimum lost motion Less drag and wear. Fits: Mariner/Mercury/Mercruiser 1965-date; Force 1993-date w/Mercury controls All Mariner engines with Mercury/Mariner controls (except pre-1993 40hp & lower) All 1993-date Force (US Marine) w/Force/US Mariner/Mercury controls