This is a survival server called Minepxl. It's really fun to come here play suvival with your friends, and yes- you can lock your chests from other people so that they won't steal anything! But not only chests, almost everything that has a function. Just place down a sign on the block you want to protect!
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If you really like our server, please vote for us! (:
https://minecraftservers.org/vote/557549
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You are always welcome to Minepxl!