includes gear and sprocket, worm gear, grease, motor shaft & sprocket bearings compatible with chain driven 1/3 & 1/2 HP openers from Liftmaster, Sears, Craftsman & Chamberlain 1-Pack video ...
Over the last 20 years or so I've tested hundreds of gaming PCs and have always been more interested in how a manufacturer squeezes the best parts and the best performance out of their budget.