ROADINGER Bolt Set for Wheels is a complete hardware set for wheel installation, consisting of four galvanized M8 × 30 mm hexagon screws according to DIN 933, four galvanized class 8 M8 hexagon nuts according to DIN 934, and four electrogalvanized 8.4 mm washers according to DIN 125. The set is intended for use with wheels and wheel boards in rack and case applications.