Wide-Shoulder ends allow improved load-distribution to prevent vacuum leaks and our 1-1/4in x 20 studs accommodate the thickest racing gaskets with plenty of thread revolution to spare. 4 per package Product Features:Extended T-Bar Style Wing NutsMade from High-Quality SteelMade from Quality Steel3.5-inches Tall; 1 1/4-20 Thread, 1-inch Studs Included3.5-inches Tall; 1 1/4-20 Thread, 1-inch Studs Included