G22-55 G2255 Cottle Septum Chisel 7" Straight 4mm Graduated With One Tapered End G22-56 G2256 Cottle Septum Chisel 7" Straight 7mm Graduated With One Tapered End G22-57 G2257 Cottle Septum Chisel 7" Straight 12mm Graduated With One Tapered End