Rxmotor Lug Nut Open Close Cap End Formula Tuner 20 Pieces M12 x 1.5MM Gunmetal Smoke + Lock Key - Fast USPS Priority Shipping for Domestic (Blue) Made From High Quality CNC Machined Aluminum Extended Style, Bullet lug nut style, 1.9" in Length 20 Pieces Tuner Lug Nuts with Locking Key. Our capped lug nut will protect the inside of your lug nut and your wheel studs against oxidation, rust & dust These caps convert the open end lug nuts to a close end design. simply screw them on with a hex key The seat is a 60 degree conical style seat. most standard vehicle are using this