Xtreme Outdoor Power Equipment Replaces Warner 5217-25 Gravely 1028 RER Hydro, 10528 RER Hydro, 1232 RER Hydro, Sport ZT 1232 52711900 Lawn Mower PTO Blade Clutch - Free High Torque Upgrade Xtremely cool coil design runs over 20% cooler for a longer service life  plus every clutch is backed by a buyer-protection 1-year warranty Replaces OEM: 02763200, 51516400, 52711800, 52711900, 52712000 Replaces Warner: 5217-25 Specs: 1.000 Crankshaft, Counter Clockwise, Hub Style, 80 ft. lbs torque Free Upgraded - High Temperature Bearings. TOUGH Machined Billet Pulley with Replaceable Bearing - OEM Upgrade