This is an Axle Block kit for the Powakaddy Freeway Electric Golf Trolley.
If the axle on your Powakaddy Freeway is 'floating' up and down then it's very likely that you need to change one or usually both axle blocks (located under the trolley, these are the 2 black plastic blocks which hold the axle in place and attach it to the frame).
Replacing the axle blocks every few years is good practice as a 'floating' axle can cause undue wear on your gearbox.

 
The kit comes complete with:
2 x Axle blocks
2 x Rivets
4 x Starlock washers
2 x Starlock washer caps