The invention relates to a portable tool (100) comprising a hollow body (102) defining two chambers and having a shoulder (113) and a shank (112) extending from the shoulder (113), a cylinder comprising a sliding piston in the chambers and a rod (110) integral with the piston and housed in the barrel (112), a C-shaped head (114), a first end (116) of which forms a shoe (124) pierced with a bore in which fits the shank (112) and rests against the shoulder (113) and a second end (118) of which is opposite the free end of the rod (110), and a fixing system (120) comprising a groove made around the periphery of the barrel (112), two drawers (126a-b) slidably mounted on the shoe (124) parallel to a displacement plane which is perpendicular to the axis of the barrel (112), where each drawer ( 126a-b) has an arcuate front (128) and is movable between a constricted position in which the front (128) is housed in the groove, and a closed position. rtée in which the front (128) is outside the throat. The head of such a tool can therefore be easily and quickly dismantled and replaced as needed, without the aid of a tool or of a specialist technician.
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