Simple and reliable, and if necessary, split the loop turns out of the three bent as shown, metal plates and nail as their axis.
The purpose of such loops can be very different. For mounting each of the plates is sufficient to drill two holes for screws or bolts.
V. AVTUKH, p Ozery, Belarus
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It is intended for the instant fixing of parts of circular cross-section axes, rods, rollers and the like. It can be used when drilling the end holes, milling flats, slots, or splines....
