Masonary saw jig

A portable mitre guide jig for use with a masonary saw, said mitre guide jig comprising a triangular body portion having a work piece receiving face and a pair of symmetrical side faces converging to an apex, and an end portion to which said body portion is adjustably secured to adjust said work piece receiving face about said apex from a right hand cutting position to a left hand cutting position to enable cutting from either side of the saw, said end portion being provided with clamping means to removably clamp said mitre guide jig to a masonary saw platform, said work piece receiving face being flat and being bordered by at least one end rail which is raised relative to said work piece receiving face for preventing horizontal movement of a work piece placed thereon against said at least one side rail, an adjustable support bar for supporting the work piece on said work piece receiving face and means for locating said support bar at a plurality of different supporting positions on said work piece receiving face, said side faces providing an adjustment stop to prevent over adjustment of said work piece receiving face with respect to the saw and said body portion being provided with a plurality of spaced notches for receiving said support bar at said plurality of different supporting positions in said notches.