Two front and two rear weights for farm tractors. They came with a 1950's Mineapolis Moline Tractor. I don't know if they were used on that tractor but they were in a package deal. Not sure what else they might fit. You would need to measure to see if they might fit your tractor. Rear measurements: center hole 5 7/8" diameter. Four holes, 10" apart. Front measurements: center hole 6 7/8 " diameter, three holes and one notch, 10 1/4" apart.