Simultaneously Compresses Pistons on QuadPiston Hydraulic Disc Brakes Found on MediumDuty 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".
