Minecraft wiki entry for Structure_Block, associated text: Structure blocks are available using the /setblock, /fill, or /give commands. Structure blocks when placed are unbreakable in survival and have the same blast resistance as bedrock. This is similar to the command block. In Bedrock Edition, all structure block types are obtainable through commands with data values, including corner, data‌[Java Edition only] modes and the inventory model, although those two default to save mode when placed.