If your original VW strut mounting bolts are rusted or broken, correct replacements are hard to find. The commonly available 10mm threaded bolt has too large a head (17mm), so your socket has a hard time fitting in between bolt and strut tube. These twelve point headed bolts are very compact, strong, and are individually drilled for safety wire. You can eliminate the bend up tabs from your original bolts with this kit. Set of six with safety wire. A 10mm twelve point socket is needed for installation. Grade 12.9. Made in USA.