KUMGROT 2pcs 4 Wheel Trolley Assembly Box Rail Hanger Wheel Trolley Silent Stable Roller Trolley M12 Bolt for 1.97’’ Wide and All 1.69’’ or Taller Strut Channel

I ordered by mistake not realizing that the width was too wide for a single strut track. The product seemed well made, however I returned the item without using. The info in description was correct but I assumed that the dimensions were all compatible and sadly was wrong.

These will roll so easy you better make sure the drops are in place and solid . Roll forever and a mile.. great product , delivery was perfect price well below the agriculture box store prices ( tsc is retarded $)

Needed to order two sets to get two good hangers. The first had a really pitted roller and the other set had a bit less but still flawed. Together I have one good set. Able to return so just extra time and effort to get a good set. No desiccant in sealed packaging so I would guess that’s the problem.

These trolleys look to be well constructed but they are too big for the standard Unistrut you find at the big box store. I may still be able to make use of them by creating a gap between two parallel lengths of Unistrut and running these resting on the two with the flange between the two pieces. The trolleys are heavy duty and roll smooth. The one star deduction is because they are not compatible with standard unistrut.