Specialty Products Company (SPC) 75800 Dual Angle Shim (Red) A patented Full Contact Dual Angle shim consisting of only three part numbers that corrects Toe and Camber with one shim. It is for caliper to rotor clearance when installing this part on vehicles equipped with rear disc brakes. Some vehicles may require the use of longer bolts. Recommend use of 10408 bolts and 75970 spacers as required.