The Irwin General Construction Retractable Knife is a lightweight and durable knife, suitable for many applications. The push and slide opening mechanism provides easy, tool-free blade access for quick blade changes.The knife has a solid construction with secure parts to prevent dropping/losing components.The blade housing makes the cleaning of debris after use very easy. A trigger grip enables the user to easily cut on the pull.The knife is able to store up to 3 blades in its integral blade storage, and comes with a bi-metal blade, which is shatterproof and lasts up to 3 times longer than conventional blades.Supplied with a bi-metal, shatterproof blade.