Portable setting tool for fastening elements

A portable setting tool for fastening elements, comprising a housing (2);

• a guide tube (3) for guiding the fastening elements, connectable with the housing and having a side cut-out through which the fastening elements are fed into the guide tube (3);
• and a feeler (13) extendable into the guide tube (3) at a location opposite the cut-out (11) of the guide tube (3) and displaceable in a direction away from the guide tube (3), the feeler (13) having, at an end thereof extendable into the guide tube (3), an end surface (13a) providing for displacement of the feeler (13) in a direction transverse to a longitudinal axis (14) of the guide tube (3) upon being acted upon by a fastening element, and an adjusting rim (17) adjoining the end surface (13a) and forming, with a longitudinal axis (14) of the guide tube (3), an acute angle (α1) opening in a direction toward mouth opening of the guide tube (3), the adjusting rim providing for displacement of the feeler (13) in the transverse direction upon being acted upon by an object displaceable along the longitudinal axis (14) of the guide tube (3).