For extreme anal players! A use this adjustable ring speculum for a big, open hole! With this special speculum, you are guaranteed to gain full insight into their ass. The special speculum opens the ass in a wide circle and leaves the sub fully exposed. Dr. Sado's innovation degrades your sub to a HOLE that has to be stuffed. As simple as possible to use! When closed, the four bars of the ring-shaped speculum are inserted to a depth of approx. 9 cm = 3.5" into the anus. By evenly screwing open, stretching is now performed continuously up to 90 mm (3.5").