These are good sturdy and adjustable crutches that can accommodate an adult that is up to 300lbs and between 5'2'' to 5'10''. Adjusting the crutches is simple through push-buttons which one can adjust for the height at the bottom, and there some instructions provided about how to use the crutches - crutch height, handgrip and how the fit works. The grip is relatively comfortable and plentiful at the bottom, for the arms and under the arms. It also has a limited lifetime warranty.
These crutches are pretty much the standard crutches that you would get from the hospital, but the price is much cheaper buying from amazon!