Minecraft wiki entry for Chain, associated text: Chains can be used to suspend bells or both types of lanterns (normal lanterns and soul lanterns), as the chain texture connects to the chain of the lantern seamlessly as if it were part of it. Chains do not require a supporting block to be placed whether it is on the top, next to it or at the bottom. It can exist completely free-standing in mid air[1] and it can be rotated. Chains connect horizontally or vertically, but not across different orientations (so a chain with N orientation does not connect to a chain with E orientation in the adjacent block). Horizontal chains one block above a surface may be walked over. Horizontal chains two blocks above a surface prevent players from traveling past them. Vertical chains block travel if targeted directly, but may be skirted.