We recently purchased a plastic spring for our industrial machines, and we could not be happier with the results! Based on our own experience this plastic spring from the industrial and scientific category is highly reliable and built to last. It is easy to install and provides optimal performance even under heavy workloads. The only con is the price point, which may be a bit steep for some buyers. Overall, we highly recommend this industrial power tool for any business looking for top-of-the-line performance..