36-47 Knucklehead, 48-65 Panhead, 66-84 FL Shovel, 71-84 FX Shovel, 85-94 FX Model, 91-05 Dyna, 84-06 Softail, 86-06 Touring
Extra-long, two-piece design with inner collar that keeps the wrench on the nut for safer service work. 1 7/8" hex (repl. OEM 94660-37A).