The TC Kline camber plates use the factory upper spring bearing to allow the factory spring to pivot, which is why this is a good choice for F80 M3/F82 M4 cars looking for more negative camber.
These particular plates have 3 settings. Stock, -1 degree, and -2 degree. Note that adjustment requires lowering the shock to gain access to the upper adjustment bolts, so this is not a quick adjustment.