For sales is one piece complying ISO B18.3.2 Allen Key --
size: 7/16" (11mm)
Brand: Bremick
Alloy steel black finished (BF)
Arms length (L x S): 130mm x 38mm
Welcomed to Toolingstation
Toolingstation is an Australia company supplier of taps, dies, end mills and milling cutters, saws, keys and wrenches, and various engineering tools and supplies -- Google search