Review on ACDelco 18B413 Professional Brake Assembly by Mufti Carter

When I received them I noticed they didn't have holes for mounting bolts which the service manual says the originals had. When I removed the wheels I saw that while the original drums have these holes, the hub doesn't have matching holes for screws to drive in, so they're not used. The mounting screws are only needed to keep the drums from falling off when assembling the car (wheels last). They are not needed as long as you leave the wheels bolted on.