Simultaneously Compresses Pistons on Quad Piston Hydraulic Disc Brakes Found on Medium-Duty Trucks and Trailers, Including Walther EMC Dura-Force Hydraulic Disc Brake Systems.
11-1/2" Long breaker bar for leverage.
Also works on some dual piston brake calipers.
Can be used while caliper is on the vehicle or hanging free.
Range is 2" to 4".