The best way to extract information from an unwilling subject is to do it slowly and methodically, this ring is designed to inflict the most amount of pain in the longest amount of time. Just place the ring under the head and begin tightening the screws, as the hex key turns the spikes will dig into their skin, and they will be singing like a songbird in no time!
This is an excellent addition to any CBT aficionado's kit!
34mm diameter
12mm height
3mm thick
Made from durable & body-safe nylon plastic filament and M3 stainless steel screws. Available in a wide range of sizes from 30mm - 40mm diameter.