Attracks has now key rings with a scaled track link for the armour enthusiasts. Currently available are a Panzer III early track link and a T-55.
Attracks produces tracks for RC tanks, and these individual track links are made of metal as well.
Although I am not an expert, they look like accurate replicas of the real track links, in a nice dark grey colour with polished edges as if they would have been in use.
They are 1/8 scale, therefore the Panzer III link measures 4,7cm long, while the T-55 is 7cm
Available from their facebook page at www.facebook.com/Attracks