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
Recommend to read
THE PLANE “PILGRIM”
The plane "pilgrim" in the Tver club "Aviator" was conceived in 1978. He was born in the debates and discussions. In the end, it was decided to build it in the scheme of "Demoiselle" in...
WORKBENCH-THE TRIPTYCH
To design present a universal (I believe) bench is a necessary desktop DIY I came across several years of studying technical creativity. It was designed based on their needs. But I think...