PenBlade push button retraction utility knife. With its intuitive, modern design, PenBlade is a durable and ergonomic knife that leads the way in precision and safety. This unique tool combines a stainless steel blade that retracts at the touch of a button with a patented trimming feature. Ideal for light - to heavy-weight projects. PenBlade offers the highest quality blades available so you can get accurate, reliable performance with every cut.