These magnetic blocks are a game-changer in the workholding category of Industrial and Scientific tools. They are incredibly strong and their rubber coating makes them durable and resistant to scratches. The aluminum body ensures they won't rust or corrode, making them a long-lasting addition to your toolset. The only downside is that they are quite bulky, which may limit their use in tight spaces. Overall, I highly recommend these blocks to anyone in need of a reliable workholding solution.