Product review (5 stars): better plastic for legs and way-heavier duty rubber disk
OEM interlock is notorious for soft rubber that hammers itself into crumbles until torque shock at start up shears cheap plastic legs. This unit is much higher quality with metal for shaft contact, better plastic for legs and way-heavier duty rubber disk. Great price so I ordered two to have a spare. Doubt I'll be replacing this, however, since design and execution is so superior to OEM. Rare to be able to say that these days --- most purchases are about a nickel shy of being actually useful.