Ground Force Lowering Spindles provide 2 to 2-1/2'' of drop for today's hottest trucks and sport utilities. These spindles are made of ductile iron, reinforced in high-stress areas with heat-treated axel shafts. From the high-strength alloy bearing surfaces to the built-in steering stops, each model is designed for maximum wheel back spacing of 3-1/2'' inches to fit a variety of wheels. Made in the U.S.A.