Kastar 4-in-1 brake caliper spreader – kas279 the 4-in-1 brake caliper spreader works on twin and quad piston calipers, as well as single and twin piston floating calipers. Centrally located ratchet evenly spreads force in a parallel manner to prevent misalignment of pistons. Ratchet technology gives a full 360 degree swing so that the spreader may be placed at any position. Extended reversing lever allows for easy change from spreading to retracting.