The Lang Tools 4-in-1 Brake Caliper Press (No. 279) works on twin and quad piston calipers, as well as single and twin piston floating calipers. The 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. An extended reversing lever allows for easy change from spreading to retracting. Patent pending. Made in the USA.