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The original was posted on /r/whatisthis by /u/man-made-tardigrade on 2023-09-21 13:36:43.

Original Title: I need some help identifying an object. It crashed through the roof of the house with great velocity. It bounced around the house. The black bracket looking part was embedded in the wall. The pulley looking part end up on the floor. The pulley fits over the shaft on the bracket.