Feature: 1. Smooth Sliding: 6 wheel design ensures smooth rolling performance with good stability, and the operation is very safe and easy with low noise. 2. Good Structure: Adopting rolling bearing, the trolley assembly has been through fine welding and CNC crafting to form highly sturdy structure. 3. Extensive Uses: Allows for wide application on home movable doors, wardrobe, large iron doors, curtains, automatic equipment components, etc. 4. Steel Material: The utilization of premium iron and S45C carbon steel materials enables excellent durability against rusting and corrosion. 5. Easy to Install: Comes with a compact size and a light weight as well, the trolley roller is very convenient to install within several minutes. Specification: Item Type: Hoist Trolley Product Material: Iron, S45C carbon steel. Applicable Strut Channels: Approx. 4.4cm / 1.73in wide, and 4.6cm / 1.81in high. Breaking Load: 6613 Pounds Package List: 4 x Hoist Trolley If you like our store, Please add our store to your Favorite Stores, You can get our New product and Discount information. Your satisfaction and positive feedback is very important to us. Please leave positive feedback and 5 stars if you are satisfied with our items and services. If you have any problems with our items or services, please feel free to contact us first before you leave negative feedback. Smooth Sliding: 6 wheel design ensures smooth rolling performance with good stability, and the operation is very safe and easy with low noise. Good Structure: Adopting rolling bearing, the trolley assembly has been through fine welding and CNC crafting to form highly sturdy structure. Extensive Uses: Allows for wide application on home movable doors, wardrobe, large iron doors, curtains, automatic equipment components, etc. Steel Material: The utilization of premium iron and S45C carbon steel materials enables excellent durability against rusting and corrosion. Easy to Install: Comes with a compact size and a light weight as well, the trolley roller is very convenient to install within several minutes.