SKTREX 6 Wheel Trolley Assembly Electric Hoist Easy Installation Roller Trolley Silent for use with Unistrut 1-5/8" Wide and All 1-5/8" or Taller Strut Channel 4 PCS

Great quality. All the wheel roll effortlessly and smooth. Have 1 set probably over 6 years old and still operates like the day I installed.

Bought these to make an overhead lift with. They are great to use, I needed something like 10-12 of these trolleys in total, and I'm very pleased. The only problem when using them like this, is the brand and type of unistrap or channel Very's slightly in the width, so some ices may be tight. Not the trolley's fault, just something to look out for.

Trolley assembly works well as long as the mounting brackets are not to tight. Rolls in the Unistrut great even with a heavy load

Works as advertised . Hooked it up to a winch from harbor freight using inch and 5/8 unistrur and it glides in the rails