We're about to have a new drive laid, and I thought I'd take the opportunity of burying some form of security device in the ground while it's being excavated, that I can use to temporarily secure by padlock and chain a pushbike/trailer/ladder/anything else suitable. I'm envisaging a ring or loop 2-3" in diameter protruding from the ground, with the other end buried in a large lump of concrete below the surface.
I know there are various devices which you can bolt to the ground for this purpose; however my version should be neater, much more secure, and probably cheaper!
Any suggestions where I can procure something suitable, either purpose-made or fabricated? Needs to be very strong (angle-grinder proof ideally?) and corrosion-proof obviously.
Thanks David