Please help, Strong off camera flash cord needed.

I need a STRONG off camera flash cord, if you see below the bottom right part (The square With intruding screw thread) that clips into the flash bracket. It is made of plastic and breaks very easy, does anyone know of one that is made of Metal or hard core plastic?
The one I have is from Pixel and cheap. It broke in seconds just under the pressure..

Thanks in advance

EOS 5Dmk3 X2, 60D, EF24-70mm f2.8L mk2, EF70-200mm f2.8L IS mk2, EF85mm f1.8, EF50mm f1.4, EF50mm f1.8 mk1(350D with 18-55mm Sh"kit" lens).
Speedlite 600EX-RT, 430EX II Flash. manfrotto 190XDB tripod, Giottos GTMML 3290B Monopod, B+W 77mm 110 Single Coated filter, Hama 77mm Variable Neutral Density Filter.

EOS 70D x 2 units + EOS 7D mark II x3 units
Newton FR3, Newton modified bracket, EF 17-40mm x4,EF 24-70mm f/2.8 x2, EF 70-200mm f/2.8 x2
Quantum Trio x2, T5D-R x1 + FW7Q x1, CoPilot x2, Godox AD-180 x5
Propac PB960 head x12, PB960 battery x10
sorry, no stupid speedlite from Canon !

tongki wrote in post #16536895
go wireless and your cheap plastic problem solved !

Which wireless units should be used from camera to bracket?

EOS 5Dmk3 X2, 60D, EF24-70mm f2.8L mk2, EF70-200mm f2.8L IS mk2, EF85mm f1.8, EF50mm f1.4, EF50mm f1.8 mk1(350D with 18-55mm Sh"kit" lens).
Speedlite 600EX-RT, 430EX II Flash. manfrotto 190XDB tripod, Giottos GTMML 3290B Monopod, B+W 77mm 110 Single Coated filter, Hama 77mm Variable Neutral Density Filter.