Product review (4 stars): Product installed fine  & as described but consider this:
My guess is the new metal reinforced arms is potentially a double edge sword.  They fit very snugly and you need to tap them on with a hammer. I found that a 3/8 inch ratchet extension turned backwards fits the diameter of the metal collar just fine. I was pretty cautious so it took me about a minute or so to slowly mount each of the arms separately to both the motor arm and the transmission drive arm under the clothes basket until they were flush with the drive arms .  I placed the rubber grommet/coupler on the drive arm under the clothes basket and then lined up the holes with the male pins of the coupler on the motor arm.  This is where it gets a little tricky/ frustrating because you have to keep the two sides of the coupler aligned as you try to push the motor/coupler half onto the other half of the coupler that is mounted on the transmission arm so that the pins from one half of the coupler (mounted on motor arm) align and slide into the holes of the other half of the coupler (mounted on the transmission arm).  It takes several attempts and some swearing and the motor is quite heavy to have to hold steady and keep aligned. Okay so finally all assembled and everything works great. Now my concern is any future replacement that is necessary.  The rubber grommet that comes with these couplers is not the reinforced kind which I prefer and had on previously. The rubber ones are pretty much worthless and will breakdown in  1 to 3 years. The reinforced one I had on has been on for years. And since the holes were a bit worn and I misplaced it I used the cheaper unreinforced rubber one that came with the kit. If the new metal reinforced arms last a long time, not so bad because then you only need to replace the rubber grommet,  But if the plastic coupler arms break its going to be a be-actch to get them off the drives arms cuz they are pretty snug and can't get a lot of leverage especially with the side mounted under the clothes basket.  At least the motor/side  can be removed for easier access. You might almost need like a gear puller.  I lubricated the drive arms with grease to avoid the complication of rust seizure later on. I guess my last, all-plastic coupler with the reinforced rubber grommet lasted a long time.  Therefore I think the ideal coupler would be the all plastic arms with the reinforced grommet. It will last a long time and be easy to replace compared to the metal reinforced coupler. I would say I got 10 or 15 years out of the reinforced grommetkit, maybe more.  Other wise this kit worked fine and you get 2 for the price of one.  Just good luck removing the first one that breaks.