Made, by the craftsman, usually from an old table knife. The end of the knife blade is cut to form two sloping shoulders but leaving a parallel 4mm tang approx. 8mm long which is turned at 90 deg. Used, when Weather Pointing, with a bevelled straight-edge fitted with 10mm stops to hold it from the wall face; the tool is used to cleanly cut surplus mortar from bed and cross joints and the tang removes this from the wall face.