Hand held adjustable device

A hand held adjustable device comprising:

• a grip provided with an end portion;
• a plurality of needles which extend axially from the end portion and are made of electrically conducting material,
• wherein means for adjusting mechanically the maximum depth of introduction of the needles in a tissue are provided, comprising a cup-shaped body borne by said end portion of the grip and provided with an end wall provided with holes for the passage of said needles;
• a system for mechanically adjusting the relative position between said cup-shaped body and the end portion adapted to provide a manual axial sliding of the cup-shaped body with respect to the end portion and an angular movement between said cup-shaped body and the end portion to select a number of stable axial positions between said cup-shaped body and said end portion and adjust the length of the portion of the needles that projects from said end wall in order to establish a number of different lengths,
• wherein said system for adjusting the relative position comprises a groove which extends axially along a side wall of said cup-shaped body and a stop element that extends radially from said end portion of the grip and engages said groove, said groove further comprises a plurality of transversal seats spaced along the groove itself and for defining respective stable axial positions.