Interesting comments I was recommended high tensile cable (from a boat yard) rather than chain, this has been engineered into two 6 metre flyleads.

When buying the company that attached the end tried a grinder and bolt croppers (just chewed up the blade on the grinder)

i use a series of handgrenades cunningly wired….

Road bike in the Kitchen. Mountain bikes in the spare room. House pretty secure with decent reinforced doors,not the crappy externally beaded ones.