If you want to experience an extreme ball toy then the stainless steel Ball Bruiser Ball Stretcher is for you. The distance between the double set of ballstretchers can be increased by turning the wheel embedded in one of the ball stretchers. They each have a tight inner diameter of 32mm. The result is an extremely long ball sack! You can enhance the feeling further by screwing the sharp points inwards with the included hexagonal key. The pinching of the tightened skin is pure ball torture! The points are sharp but not usually sharp enough to break the skin. If you are planning on doing this to someone who is tied up remember to stay close and most importantly of all, don't lose the key!