Based on my experience, these plastic inserts are perfect for finishing tubing projects in the industrial and scientific field .They are easy to install and provide a professional look to any project. The biscuits and plugs fit snugly and do not fall out. Additionally they are made of durable materials that last a long time. However, the package did not come with a variety of sizes, limiting its versatility in different projects. Overall, I highly recommend these biscuits and plugs for any industrial or scientific tubing projects..