An allen key is included this is used for the bolts connecting the back and seat pads to the frame , as is a multipurpose wrench.
Grooved rubber feet to keep flat bench in place.
It is rated for 1,000 lbs maximum capacity.
It has 6 back pad adjustments, from flat to 85 degree incline, and 3 seat pad adjustments, from flat to incline.
Quickly adjust the seat pad with a pop pin, to slide forward and back and eliminate any gap between the seat and back pad.
The main difference between the 5000 and 5100 is the seat design.