Muteki SR48 Open End Lug Nuts are constructed from cold forged 50BV30 chrome vanadium. Each lug nut weighs only 2 ounces. Muteki SR48 Lug Nuts are compact, designed to accommodate small diameter wheel holes found in today's high-end street, lightweight racing, competition road wheels. Constructed with an oversized 60-degree tapered seat that provides a better contact area. A knurled perimeter top allows for easy installation. The open top nut allows for full stud engagement, accommodating long race studs. Each set of Muteki SR48 lug nuts includes (20) 48 millimeter open end lug nuts and 1-piece 17 millimeter hex wrench and lock key adapter.