Patent ID: 8672275

Claim:
A fire stop collar assembly comprising: a metal casing strip having an inner and an outer surface and having successive segments with a weakening line between successive segments, said metal casing strip constructed so that in use the strip is severed at a weakening line to bring the casing strip to the desired length to allow it to be wrapped around a pipe or other duct, the metal casing furthermore having positioning members; a severing tool having an inner surface and a side edge, the severing tool further comprising a holding member having an inner surface spaced from the inner surface of the severing tool, the holding member being constructed and arranged, when in use, to hold the casing strip and to cooperate with the positioning members of the casing; wherein the assembly is arranged when in use so that the holding member of the severing tool is in cooperation with the positioning members of the casing, and so that at least a portion of said inner surface and said side edge of the severing tool is positioned in direct contact with the outer surface of the casing strip adjacent one of the weakening lines and the strip can be bended and broken at said weakening line along said side edge of the severing tool.