HD-OEM: 23966-54APart Number: 16-1809 UOM: 1 - EA Summary:The Jims flywheel nut socket features a low profile to give 100 percent nut contact, machined flat at nut receiving end to eliminate rounding off the nut. Fits 1/2" Drive.Fitment: FL 1954-1981 FX 1971-1981 Country of Origin: USA