These high quality bolts replace the original style locking tab and bolts VW used when the cars were assembled. These 12.9 grade silver zinc plated bolts are just what you need when replacing strut housings. You will appreciate the ease of installation if you have noticed that the original bolts don't work so well when you upgrade to aftermarket strut housings while lowering the front of your Super Beetle. A 10mm twelve point socket is needed for installation.