These number plate bolts combine theft prevention and dress-up features. They protect your car's number plates and frames from theft and vandalism. The bolts have a center pin and are installed with a special wrench! Of course, they cannot be removed without the special wrench. Washer Color: Silver [Set Contents] 4 bolts, 4 washers, 1 L-shaped wrench. Size: M6 x 20mm (thread length 15mm) [Material] Washer: Aluminum, Bolt: Stainless steel [Installed with a special wrench] The bolts have a center pin and are installed with a special wrench! Of course, they cannot be removed without the special wrench. Torx, Torx screws, Torx bolts