This is the 6-1/2" inside width wheel chock installed in my motorcycle trailer
This is the 3-1/2" inside width wheel chock installed in my motorcycle trailer
Mounting bracket - The direction the small ends of the holes face is the direction your motorcycle will be facing
These pegs on the wheel chock insert into the holes of the bracket then the chock slides forward into the small portion of the holes to secure it
This is what it looks like underneath the truck or trailer when the bracket is installed