9/16 Chrome O.E. Bulge Acorn Open End Lug Nuts 3/4" Hex (9/16-18 Thread Size) .84" Tall (32) Acorn Bulge Design, provides greater seating surface to prevent damage during installation. Cold Forged Carbon Steel then heat treated for enhanced Rigidity and exceptional strength. Open-end Acorn Bulge Design, Hex: 3/4"; Height: 0.84"; Weight: 1.3oz each. Please refer to the photos for additional details.