Precise spline sizes included: 12 spline (13/16″, 11/16″), 7 spline (3/4″, 5/8″, 11/16″), 6 spline (41/64″, 45/64″), 5 spline (5/8″). Professional Grade Spline Lug Nut Removal Tool Set. Master kit removes broken, peeled, rusted, rounded-off, or frozen spline and hex lug nuts with ease.