These replacement jaws are exactly what I needed for my industrial hand tools .Based on my experience, I can say that they are made of high-quality material that can withstand heavy-duty use. They fit perfectly onto my existing tool and the grip is exceptional. The pros of these jaws are their durability and long-lasting performance. The only con is that they are slightly pricey as compared to other products in the market. Overall, i highly recommend these replacement jaws for anyone looking for a high-performance industrial and scientific tool..