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Amazon.com: ATOPLEE Miniature Ball Bearings 100pcs 681ZZ Tiny Metal Ball Bearings Wheel Roller for Toy Model DIY Mini Stuff (1x3x1mm) : Industrial & Scientific
![What is this round metal thing? It is hard and a little smaller than a penny. It has holes and red stuff around the edges. On one side there is yellow glue What is this round metal thing? It is hard and a little smaller than a penny. It has holes and red stuff around the edges. On one side there is yellow glue](https://preview.redd.it/what-is-this-round-metal-thing-it-is-hard-and-a-little-v0-sgjqir670zib1.jpg?width=640&crop=smart&auto=webp&s=2a6435e0a4f4db7cdcedde6ec7a97f601a275691)
What is this round metal thing? It is hard and a little smaller than a penny. It has holes and red stuff around the edges. On one side there is yellow glue
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Amazon.com: Metal-Puzzles 3D-Brain-Teaser Toys: Cool-Gadgets-Stuff Box Puzzles-Toy for Kid Children Teen Adult, ADHD Tools Stress Relief Gift for Office Home School Christmas Women Men Square-Cube : Toys & Games
![Found this metal sphere in a box with some other stuff. Two parts that can screw togheter. Nothing inside but there is a bit of space. What could be used for? : Found this metal sphere in a box with some other stuff. Two parts that can screw togheter. Nothing inside but there is a bit of space. What could be used for? :](https://i.redd.it/bnizq6bpihg41.jpg)