UltimationHeavy Duty 1,000 Pound Capacity I-Beam Trolley with Side Guide Rollers - Ideal for Automotive Assembly Plants - Industrial Grade, High Load-Bearing Fits 3", 4", and 6" Tall Trolley Systems

Title says it all

I purchased this to hang a heavy bag to. It easy to assemble. I purchased this for the main reason to conveniently roll the heavy bag out to use and then easily roll out of the vent we of the basement when done working out. Great product!

Exactly the product advertised. Have used it once so far to lift a truck motor. No problems at all.

smooth operation

Purchased and had to create a was to mount it to my Ibeam. Unfortunately my beam was 8 inches tall, then after reading carefully it goes up to 6 inches. This will simply not work on an 8 inch unless you create a way to attach it. I did and it works great.

look well built , hooked a 2200lb electric winch to them , although they wont see max weight , they will get a work out , and they slide smooth and stable

I liked mine so much and was so easy to install I bought my father one. These are well worth the money for in the garage work.

We made a lift for the loft of our barn.