A tool for manipulating a solid material target with combustion products from a propellant, wherein the propellant is a generally explosive material, which has a low rate of combustion and once ignited produces propellant gas via at least one of burning, decomposing or deflagrating, the tool comprising: a housing comprising at least one outlet for combustion products produced by ignition of at least one propellant source , wherein the at least one propellant source is contained within the housing , wherein the propellant source is a location of propellant provided for ignition; and an ignition mechanism for igniting propellant at the at least one propellant source ; wherein the at least one outlet comprises a plurality of exit ports on a surface of the tool , wherein, prior to ignition of the propellant, the plurality of exit ports are sealed with a fusible material and after ignition of the propellant source the fusible material melts due to heat generated by ignition, thereby opening the plurality of exit ports ; the plurality of exit ports being configured, when open, to direct the combustion products at the target wherein interaction of the combustion products with the target manipulates the target ; and wherein the plurality of exit ports comprises a principal exit port and at least one secondary exit port , the at least one secondary exit port being spaced apart from and at least partly surrounding the principal exit port , wherein the secondary exit port or ports is/are arranged relative to the principal exit port such that, in use of the tool , a jet or jets of combustion products emanating from the secondary exit port or ports substantially surrounds or surround, thereby shrouding, a jet of combustion products emanating from the principal exit port . a housing comprising at least one outlet for combustion products produced by ignition of at least one propellant source , wherein the at least one propellant source is contained within the housing , wherein the propellant source is a location of propellant provided for ignition; and an ignition mechanism for igniting propellant at the at least one propellant source ; wherein the at least one outlet comprises a plurality of exit ports on a surface of the tool , wherein, prior to ignition of the propellant, the plurality of exit ports are sealed with a fusible material and after ignition of the propellant source the fusible material melts due to heat generated by ignition, thereby opening the plurality of exit ports ; the plurality of exit ports being configured, when open, to direct the combustion products at the target wherein interaction of the combustion products with the target manipulates the target ; and wherein the plurality of exit ports comprises a principal exit port and at least one secondary exit port , the at least one secondary exit port being spaced apart from and at least partly surrounding the principal exit port , wherein the secondary exit port or ports is/are arranged relative to the principal exit port such that, in use of the tool , a jet or jets of combustion products emanating from the secondary exit port or ports substantially surrounds or surround, thereby shrouding, a jet of combustion products emanating from the principal exit port . <EOS>