Abstract: In a band saw, blade drift is corrected and straight line cuffing of an object is easily performed. A cuffing auxiliary device in the band saw used to correct a shift of a cutting line when the cutting line is shifted from a straight line in the band saw for cutting a work by using a flexible steel band. The cutting auxiliary device in the band saw has a laser projector attached to a band saw main body side and projecting a laser beam so as to be overlapped with the shifted cutting line when the work is straightly cut by the flexible steel band on the working board and the cutting line is shifted from the straight line; and a working board fixing portion for fixing the working board to a receiving portion of the band saw main body side in a place which the straight line of the laser beam projected from the laser projector and a mark on the working board are aligned.

Abstract: To provide a parallel ruler device with which it is easy to obtain a plate material of a constant width having parallel sides. Also, to make it possible to easily carry out a precision adjustment of an amount of parallel movement of a ruler face by means of a visual observation. Also, to enable a precision adjustment of a desired dimension in both a positive direction and a negative direction with a position fixed once as a base point.

Abstract: A clamp tool for woodwork or metalwork in which a screw mechanism is not apart away from a shaft and is not exposed is disclosed. In the clamp tool, a pair of clamping brackets is disposed on a shaft apart from each other and at least one clamping bracket is movable along the shaft to fasten a workpiece in cooperation with the other clamping bracket. Here, a female screw constituting a screw mechanism is disposed at one end of the shaft, a male screw constituting the screw mechanism is rotatable in a slide cylinder disposed outside at the end of the shaft so as to be screwed to the female screw, a handle for rotationally manipulating the male screw is disposed, and a guide portion is disposed between the shaft and the slide cylinder so that the female screw does not rotate but goes straight with the rotation of the male screw so as to allow the clamping bracket disposed outside the slide cylinder to move along the shaft.