Well, Storm_Cat and Nymph, there's really nothing extraordinary about it. It's a standard inversion table, used for stretching the spine and legs and assisting with back problems. It consists of a large and stable A frame in which the "table" is hinged. The person to be stretched stands on a T bar (which I remove once the person is inverted) and has their feet fastened, quite securely, between two padded grips. These are locked in place around the persons ankles such that they can hang, upside-down, without falling free. They are, in other words, very securely locked in. You'll see from the attached photo that one grip sits behind the heel, while the other actually sits on top of the foot. This has the added advantage of severely restricting the movement of the feet; in that way it's much more constraining than a set of stocks. Once the person is inverted, you can "lock" the table at any angle, providing the perfect angle for a tickler and a very vulnerable and and inescapable position for a ticklee. It's worth noting that too steep an angle does become uncomfortable for the inverted after a time. And BWFL, you're welcome.