Barely used on my E30 M3 for less than 300 miles. I switched over to a set of full coilovers so these are for sale. Amazing quality and construction. Below are some of the features listed from the Vorshlag website. Feel free to reach out with any questions. 

Features:

• Compatible factory springs or Aftermarket springs (both M3 and base model), and all struts.
• No need to change camber plates when switching from regular springs to coilovers! Some companies sell you two totally different camber plates for coilover springs and factory style springs.
• Installs with basic hand tools, no chassis modifications required.
• Plates are designed specifically for BMW E30 chassis.
• Camber is easily adjustable at the track from the engine compartment with simple hand tools. No need to reach inside the wheel well with a wrench!
• The spherical bearing used in the Vorshlag camber plate is the largest used in any BMW camber plate. The result has much better durability and wear characteristics than the undersized bearings used in our competitors plates.
• Designed for maximum suspension bump travel. More than an inch more strut travel than some of our competitors!
• CNC machined bearing holder, Laser Cut main plate, 100% alloy steel construction - Tough as a German Tank!
• All components plated for maximum corrosion resistance and long life.
• Laser cut arrow indicates "Front", for proper orientation during installation