Swiss Aluminium Tent Pegs x 10.
These are just about one of the strongest military pegs you can buy. With their Swiss quality, concave shape and broad surface area they're extremely strong, will hold well in inconsistent ground and are virtually unbendable. A hole is drilled in the top to accommodate cord, enabling quick-assemble of shelter line attachment etc.
Available to buy singly, or as a pack. This is for 10 pegs, mixed grades but all good.
Equivalent (average) cost per peg: £1.30.