Chain stucco

Hello I would have asked a question and hope that you could answer me the answer I have installed a 58 Ritztel at my dt 50 and then you have in the workshop simply 5 chain links with a chain lock jezt is hung but the chain is already so far emptied that it no longer goes to spann jezt my idea : is it possible the 5 links simply to extend that the chain is stretched again I only for about . 3 weeks and how can I get such a stink normal chain lock on thanks already in advance