Oh what a delightful torturing device! This Throncrown is a stainless steel ring specially designed for penistorture. Shove it in place over your penis - most people will put it just behind the dickhead - and with the enclosed hexagon key you can then screw in the sharp pointed screws... Mmmmmmm.... Once the sharp points are in place the ring won't go anywhere and won't fall off. The pinching screws will make sure you won't loose your hardon!
Once you're accustomed to the pressure of the points: just give them another twist inwards and surely you'll go through the roof.
The points are sharp but not that sharp so they'll pinch but they won't (usually) break the skin.
Available in 3 sizes (inner diameter in mm): 30 mm / 32.5 mm and 35 mm.