Parameter shield; it is cut out of a block of wood in such a way as to be slightly convex at the outside, with a projecting longitudinal ridge in the middle; it is rectangular in shape, with a point projecting at both ends in the center; in the center of the aforementioned ridge is a knob that corresponds to the handle that is cut out at the concave side, and consists of a bar that runs in the same direction as the ridge [a9928df860566119ce1c1bc201c70e37]