As a hesitant buyer, I decided to try these wrenches for my industrial and scientific projects .When I tried this product, i was pleasantly surprised by their durability and precision. They helped me easily repair some machinery and were comfortable to use for extended periods. The only downside is that they are slightly heavier than other wrenches I have used. Overall, I highly recommend these wrenches for anyone in need of reliable and high-quality industrial hand tools..