Kicks Project R40 Lug Nuts are for those that demand only the best! Each kit contains a set of 16 Lugs, and 4 Lug Locks with key. * Super light-weight - Only 40 Grams! * Thin-wall construction using strong OEM quality materials. * Oversized and taper seat to ensure best contact. * External drive by popular 17mm hex for easier installation. * Full stud engagement and can accommodate long racing studs. * Reliable and stronger than aluminum racing nuts. * Lug body produced by Cold-Forged SCM-435 material. * Attached rotating taper-seat made with A7075-T6 aluminum and ultra-hard alumite finish. * Japan patented (No. 1192260) and USA patent applied.