The REVO Version is the top of the line item with enclosed end caps. It is a 3 piece design. A cap is inserted into the end of the wheel nut enclosing the inner thread from the elements. It also evens out the  look of the nuts and keeps studs hidden. "R40" means they weigh just 40 grams each! They feature Super light-weight thin-wall construction using strong light-weight OEM quality materials which are reliable and  stronger than aluminum racing nuts. Lug body produced by Cold-Forged SCM-435 material. They also have an Oversized and tapered seat to ensure best contact. It features an attached rotating taper-seat made with A7075-T6 aluminum and ultra-hard anodised finish to protect your wheels and keep them secure.

Note: Lug nuts are made with tapered bottoms specifically for aftermarket wheels. Do not use these tuner lugs for your factory wheels, these lugs also do not fit on special wheels that require inverted lugs.