- The drop bolt installs vertically through the top frame member (wood or metal) of the door
- This ball bearing trolley has vertical and horizontal adjustments.
- The horizontal adjustment bolt is easily accessible after installation
- The connecting pin allows the drop bolt to be mounted to door before hanging, when required.
There are adjustable in and out while the others on the market are not. They have a pin that you can remove to remove the door easily. I have used many types of trolleys and these are the best.