Ahead Armor cases begin with their unique shape. Featuring revolution's patented Truform design, The shape of each case corresponds to the “true” shape of the drum Plus its mounting hardware. The universal teardrop design allows for a much snugger drum fit. It also allows dealers to reduce their inventory by eliminating the need to double-stock separate bags for tom-toms with and without suspension mounts and bass drums with and without tom Mounts.