2Pcs 4 Wheel Trolley Assembly Rollers Four Bearing Trolley Assembly for 1-5/8" Wide and All 1-5/8" or Taller Strut Channel

Works great! Used to install an elevator lift in my garage, better than the single wheel trolleys

Worked great for sliding gate in warehouse.

Serve my purpose as track for utility elevator. Wearing well and operate quietly.

I bought them a year ago to hang a barn door style sliding door and they've held up well. They roll smooth and quiet. Recommend.

If you’re looking for heavy duty these are it. I actually returned because they were much too heavy duty for my needs (a sliding TV mount).

These worked really well for creating a custom sized sliding door in an odd location. The rollers are pretty tight in the strut channel. This being said if you plan to mount the strut, you will not be able to use any lag bolts or screws within the area the rollers would travel. They will prevent the rollers from going past stopping there movement. In my case I got creative with a welder using other brackets to mount the strut. I plan to order more and use for other projects in the shop. I'll post another review for the next uses! Overall I'm very pleased with how they have worked.

Heavy duty. A pair of these is what my project needed. My project’s continuous weight is about 60 pounds, but this product, rolling inside a uni-strut could carry more weight. Very impressed.

Perfect fit! Much simpler way to make a slider door

Use them on an under the deck box 4x8x2’ to carry the weight of my gas fireplace and other summer deck ideas. I like them