What could I use for my doggs leash?

Ok so My dad threw out my dogs olod leash I usedcd to use so we bought a really cute but expensive one and we just got a dog bed and we need to chain my dog up at night and if I use his new leash he will eat right thrpough it what could i use?!?!?! HE EATS EVERYTHI NG!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!…