If you need a clamp of a certain size, it can be made from what is at hand: steel rod, strip, angle or profile. Making them need the bracket, drill holes in it and threaded (or welded nut) under the clamping bolt and the tool is ready.
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THE FIT AND PENCIL
Even if storage together with small tools marking pencil will not lose the sharpened stylus, if it is to protect your cap of a ballpoint pen.
TEMPORARY! ON WEDGES
Not always rack shelves require a stationary position. Temporarily any of them can be attached using derevyannyh wedges placed in the gap between the flange and the wall of the Cabinet.
