These magnets are exactly what I needed for my metalworking projects .Based on my experience they have a strong grip and provide ample workholding capabilities. The multi-grooved design is great for holding a variety of shapes and sizes. The magnets are also durable and well-made, ensuring that they will last for A long time. As for their cons, they may be a bit pricey compared to other workholding magnets in the market. However, given their quality and functionality, the price is reasonable. I highly recommend these magnets to any Industrial and Scientific workplace..