received in the housing cavities the collet is movable between an extended position in which the sloped surface of the housing cavities engage the collet arm wedges to urge the collet arm transversely towards the housing second wall to frictionally grip the marking material in the holder and a second position in which the wedge is received in the housing cavity such that no transverse force is applied to the collet arm and the marking material can move freely relative to the holder application_number US 17291802 A description the following detailed description illustrates the invention by way of example and not by way of limitation this description will clearly enable one skilled in the art to make and use the invention and describes what i presently believe is the best mode of carrying out the invention additionally it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings the invention is capable of other embodiments and of being practiced or being carried out in various ways also it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting a soapstone or marking material holder 10 is shown generally in fig1 and 2 the soapstone holder 10 includes a housing 12 which is generally in the shape of a hollow rectangular tube the housing 12 receives a collet 14 in fig1 the holder 10 is shown with the collet 14 in a retracted position in.