The QWORK Roller Chain Sprocket Teeth have made a great addition to my industrial equipment.When I tried this product, the smooth operation of my machinery was noticeable. The installation was easy and the quality of the material looks DURABLE and strong. The only con is that it took a little longer than expected to receive the product, but customer service was helpful in resolving the issue. Overall a great purchase for anyone in the Industrial and Scientific field looking for reliable sprockets..