4 Wheel Light Duty Trolley Assembly, Electro-Galvanized Zinc

I'm a Electrician and use uni-strut daily for mounting and strapping. I wasn't aware that there rollers even existed. I used them for heavy thermal curtains in my garage. Very heavy duty, and roll smooth. I can imagine they will work for years to come.

Worked well for a hanging computer track system in my basement. <100lb. Not very smooth or precise but gets the job done.

I used these strut trolleys with park tool machine thread bike hooks (8MM) for a sliding ceiling mount bike storage for my garage. At first I was hesitant to spend the money for a glorified coat hangar, but the trolley is sturdy, rolls very smoothly, and is a perfect pairing with the park tool hook. I would purchase these again.

For my use these trolleys work just as well as the name brand version while saving money. Add some oil to wheel bearings, mine were dry. Otherwise they work well with rail.

I used these on a lift in my house, they work great.

I’d buy more, but they seem to often be out of stock in multipaks, at least recently

flimsy, didn't fit in standard unistrut

I hung an interior door using unistrut. They fit fine but the bearings are stiff and noisy. I oiled them with proper oil but they still are hard to roll. Definitely not smooth.