Patent ID: 8413369

Claim:
A device comprising a body and a penetrating end; wherein the body has a top pounding surface, a bottom surface, a first facing surface and a second facing surface, each facing surface facing away from the other and having a width of about 1.75 inches to about 5 inches and a height of about 1.75 inches to about 5 inches; and wherein the penetrating end is attached to the bottom surface of the body and wherein the penetrating end has the same or a narrower thickness than the body of the device, or is pointed, and wherein the penetrating end has a narrower width than portions of the body located above the penetrating end; wherein the first facing surface comprises from 4 to 200 spiked projections that project away from the first facing surface; and wherein the second facing surface comprises 4 to 200 spiked projections that project away from the second facing surface.