The latest Grip masterpiece from SG is the Double Death Barrel GripBell. It has a 4" diameter gripping cylinder on one side and a 3" diameter gripping cyliner on the other. The design is such that the diameters meet in the middle so your fingers do not have the ability to get under them. This wreaks havok on your fingers and thumbs and also makes them crazy strong. Comes equipped with solid 1" loading pin that runs through the bell. Olympic sleeves can be added for an upcharge.
Collars sold separately.