a holder detachably connected to {TAIL ~ said horn}, said holder having a corned portion which is formed with a slit, said slit being so sized as to snugly catch a base portion of {HEAD ~ said cutter knife}; and 
a holder detachably connected to { TAIL ~ said horn } , said holder having a corned portion which is formed with a slit , said slit being so sized as to snugly catch a base portion of { HEAD ~ said cutter knife } ; and
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH