Belt sander DIY https://www.youtube.com/watch?v=K8JKF9_YvBg Roller for belt sander https://www.youtube.com/watch?v=CxQRLNvVu8M DIY drilling machine https://www.youtube.com/watch?v=Sku1LnxZNZY Furnace burners from pipes https://www.youtube.com/watch?v=txbqg_bOjNY How to make a forge https://www.youtube.com/watch?v=CodqsYZBB3M Useful for every master in the house. Do it yourself with your own hands and a unique tool will always come in handy. Why buy expensive tools when you can do everything yourself for free.