Advantages of 4-wheel steel trolley assembly:
1. The wheel trolley is made of steel plate and stainless steel bearings with a galvanized finish. It is durable and sturdy, not easy to deform or break, rust-resistant and wear-resistant, and can serve you for a long time.
2. The beam trolleys are forged using close craftsmanship, which has a smooth finish and greater stability. The bearings and pins are firmly welded, which can ensure the stability of the work without making any noise.
3. Stable trolley assembly is widely used for warehouses and construction sites, such as ceiling trolley systems or electric lifts, and automation equipment pulley assembly. It is a useful tool for transporting heavy items, to meet your need for work.

Easy to install and use:
No other tools are needed, just need to put the trolley roller wheels assembly into the strut channel, and tighten the hexagon nut. 3 nuts are included so that you can use the dollies upside down.

Product Specification:
Material: steel plate and stainless steel bearings.
Max Load Capacity: 1800 lbs(800 kg).
Fit for use with 1-5/8" Wide and All 1-5/8" or Taller Strut Channel.
Total length: 3.3"/84mm.
Total width: 1.3"/33mm.
Bearing diameter: 1.18"/30mm.
M10 bolt length: 3"/76mm.
Package includes 2pcs stable welded roller trolley with bolt and 3 nuts.