SHANKPRO Shank Protector for tillage with 7/16 inch Bolts 1 ½ to 2 1/8 Bolt spacing 9 inches long 1.7 inches wide (fits 1 ¾ shanks) Requires ¼ inch longer Bolts Fits Oliver, New Idea, Sunflower, White Cultivators, Tillage and More Other sizes available, price on other sizes may vary.