A professional locksmith tool, including a handle and a decoding end piece, the decoding end piece comprising: a carrier having a longitudinal axis and a first and second end, and openings arranged longitudinally along the axis at the first end; pins arranged perpendicularly to the axis at the second end of the carrier; two pumping elements mounted on the carrier, the handle comprising: an axially arranged power swirl in the form of a cup forming a cavity; a threaded bushing mounted at one end in the cavity of the power swirl; a threaded plug, screwed to one end of the bushing; a puller mounted at another end of the bushing and having an axial stop relative to the bushing; a further swirl with a cavity in which the end of the bushing with the puller is mounted, along the axis of the handle are formed axial openings through the power swirl, the threaded plug and the puller, in which openings are mounted the carrier and the pumping elements of the decoding end piece, a retainer fixing the carrier to the power swirl and passing through a round opening located towards the second end of the carrier, and two pintles, the first pintle passing through the second round opening of the carrier and being fixed to the threaded plug, the second pintle passing through a round opening of the respective pumping element and through an oblong opening of the carrier, being fixed to the puller; wherein: - the bushing of the handle is located at one end in the power swirl with the possibility of axial and rotary displacement; - the openings at the first end along the carrier are arranged successively one oblong and two round openings (16', 16"), and at the second end of the carrier openings for the pins are transversely provided having corresponding coaxial slots, and the openings being made at equal distances from each other, corresponding to coding plates of the lock; - the decoding end piece also including holders for pins, each holder having a protrusion, geting into the coaxial slot of the opening for pin of the carrier; - the two pumping elements are arranged longitudinally on both sides of the carrier, each pumping element having a round opening and axially arranged two oblong openings (20', 20"), so that the round opening of the pumping element corresponds to the oblong opening of the carrier and the oblong openings (20', 20") of the pumping elements correspond to the round openings (16', 16") of the carrier, wherein each pumping element has slots inclined with respect to the height of the pumping element, the protrusions of the pin holders coming through in the slots of the pumping elements; - the decoding end piece further comprising two guides with angular shapes located on the pumping elements mirror-wise at height, on one arm of each guide a number of pinholes for pins are made at one end along each guide, on the second arm of each guide at the other end along its length there are made successively from the end one oblong and two round (24', 24") openings, corresponding to the openings of the carrier, and the second arm of each guide being cut from the end side with the pinholes. - the bushing of the handle is located at one end in the power swirl with the possibility of axial and rotary displacement; - the openings at the first end along the carrier are arranged successively one oblong and two round openings (16', 16"), and at the second end of the carrier openings for the pins are transversely provided having corresponding coaxial slots, and the openings being made at equal distances from each other, corresponding to coding plates of the lock; - the decoding end piece also including holders for pins, each holder having a protrusion, geting into the coaxial slot of the opening for pin of the carrier; - the two pumping elements are arranged longitudinally on both sides of the carrier, each pumping element having a round opening and axially arranged two oblong openings (20', 20"), so that the round opening of the pumping element corresponds to the oblong opening of the carrier and the oblong openings (20', 20") of the pumping elements correspond to the round openings (16', 16") of the carrier, wherein each pumping element has slots inclined with respect to the height of the pumping element, the protrusions of the pin holders coming through in the slots of the pumping elements; - the decoding end piece further comprising two guides with angular shapes located on the pumping elements mirror-wise at height, on one arm of each guide a number of pinholes for pins are made at one end along each guide, on the second arm of each guide at the other end along its length there are made successively from the end one oblong and two round (24', 24") openings, corresponding to the openings of the carrier, and the second arm of each guide being cut from the end side with the pinholes.