US Patent 7350341 Bit guard

A mouth protection apparatus includes a substantially planar bit guard including first and second sides, and an inner aperture with first and second removable arcuate members. A first connection edge is releasably engageable with a second connection edge, wherein the first connection edge and the second connection edge define a first slit that intersects the inner aperture. A first tab extends from the first connection edge and is engaged with a first tab receiving aperture disposed proximate the second connection edge. A second tab extends from the second connection edge and is engaged with a second tab receiving aperture disposed proximate the first connection edge.