This Squeeze Safety Knife has a spring-loaded blade that retracts automatically when pressure on the squeeze trigger is released. Plus, easy trigger squeeze technology exposes the blade and helps reduce user strain.**** With a blade lock to help prevent accidental blade exposure, this is a great cutting solution for corrugate, tape, and more. When working continuously with cutting tools in a fast-paced environment, accidents can happen. You can help reduce the risk of cuts, lacerations, and punctures on the job with the STANLEY® line of safety knives.