Manual, pneumatic heel nailing machine for lady work, with sequence nailing of 5 cylinders and 7 nails hinged jack. S81/MDV is equipped with an hydro-pneumatic hold-down cylinder with adjustment of the second pressing cycle and with safety device for accident prevention. The sequential nailing (1 nail at time) is operated after the bimanual command. For this nailing machine are available a wide range of stand-jacks. This machine complies with accident prevention regulations and industrial health.