Building upon the reputation of the Mark I Series™, the Mark II TrimMaster® arrives with leading technologies such as the POWER slot™ hinge, easier bending, making smaller J channels and hollow core hinge extrusions for added strength. We’ve also left you the ability to make fine-tune adjustments to this brake, though you may never have to. Ultra high molecular weight polymer wedges are independently adjustable and replaceable should the occasion ever arise.