Abstract: A holder for a portable electrical cutting instrument having a cutting tool, the holder comprising a base plate having a planar bottom surface, an aperture in the base plate through which a cutting tool projects, means for clamping the cutting instrument above the aperture, first and second angular adjustment means secured to the top surface of the base plate on each side of the clamping means, a rigid harness interconnecting the first and second angular adjustment means with the clamping means for unitary movement therewith in angular planes of adjustment, whereby to provide tilting of the cutting instrument at least 45.degree. in two directions from a plane vertical to the base plate, an elongated straight edge guide having a bottom surface coplanar with the planar bottom portion of the base plate, means for moving the edge guide to a desired position of adjustment relative to the cutting tool and parallel to the angular planes of adjustment.