This kit is for replacing automotive brake pads and shoes and compressing the pistonback into the caliper. works onall cars and trucks.360 degree swing ratchet designed spreader, it is easy to get into place and use from any direction.Thistool is equipped with 2 groups of push plates: 7.01″ x 2.36″ and 4.53″ x 2.17″ .Smaller ones are suitable for disc brake system with twin and quad pistons fixed calipers, or single and twin pistons floating calipers.The larger plates fitsome 6 pistonfixed calipers. Also this ratcheting caliperis designed to “push” the piston back, not twist and compress.