The Anal Hook
This impressive steel hook can be hooked up to ropes and other bondage equipment, making sure it keeps a strong hold on its wearer. There's 5" of insertable length (the ball and a portion of the hook). The hook then rests against the back, while the ring (3.8 cm in diameter) is used to connect to ropes.
The ball measures 3.8 cm in diameter and has a 13 cm circumference.