This is a heavy-duty stainless steel CBT device that is perforated with 28 holes through which adjustable screw points can be threaded to put the pressure on your sub. The screw points have blunted ends to avoid piercing sensitive flesh while still pressing in on their package.
The points are fully adjustable with the included hex key: start with them withdrawn all the way, then put Toms Spikes to work as you begin to tighten them up to inflict as little or as much discipline as you desire. They can even be removed entirely and becomes a smooth steel stretcher.
Maximum inner Diameter: 45 mm
Minimum inner Diameter: 25 mm