A: The strap is 36-inches long with the hook stitched in half way so each end is 18-inches. Depending on how much weight its holding the strap lengths have to overlap to allow the Velcro to work. For maximum holding (300 pounds) the ends must be completely overlapped. If its something lighter you can, of course, have less overlap.
A: These are 36 inches in length.
A: The weight capacity is 300 lbs.