This 10-piece set of 55mm extended wheel studs by Rocky Mountain Bearings fits Honda and Acura models with 12mm x 1.5 inch lug patterns. The durable alloy steel studs feature a gold zinc exterior finish and are designed for performance. Specifications: knurl diameter 0.485˝ - UHL 2.850˝- knurl length 0.275˝ - nose length 0.350˝ - diameter pitch M12 x 1.5 - wheel stud hole size cast iron/steel hub 0.469˝ - 0.479˝ - cast iron/steel hub drill bit size (actual dim.) 12mm (0.472˝) - wheel stud hole size - Aluminum Hub 0.469˝ - 0.475˝ - aluminum hub drill bit size (actual dim.) 12mm (0.472˝). Thread size: m12 x 1.5 Bolt. Type: pin bolts. Grade: 10.9. Interchange part# 100-7711, 1007711. Internal sku: rmbwstud002-a