The Holland ProPar parallel axle QEM/QEM Plus trailer braking system is now interchangeable with conventional 2 11/42" anchor-pin braking designs. According to Holland, this system delivers:
- 12% more usable torque output.
- 6% or more usable lining volume, with an average shoe rebuilding life of four to five times.
- 17% greater lining/drum surface contact.
- 12% less force required to achieve deceleration.
- More push-rod capability.