Knife

The invention relates to a cutter (10); and blade (16) tool rest comprises a (14) and can be opposite to the operation of knife rest (14) and (24), (24) (14) and a action switch and tool rest of the operation (GE/GK); when pressure (D) is affects to the blade (16) knife edge (17), wherein introduces the knife rest (14) and operation (24) is additional relative motion (R); the relative motion with a nothing to end of the surface (x) and operation (24) which is knife rest (14) is position sensor (. Relative motion trigger part of the two along the direction surface (x) are coupling operation (24) and knife rest (14) matching plug (PORT and S-SHAPED) is separation.