This Irwin® ProTouch Retractable Blade Knife is ideal for general maintenance jobs. It has a lightweight hard-wearing aluminium body which gives 6 times longer life. It also has thicker walls in areas of greatest wear e.g. nose underside and heel.The blades are virtually unbreakable and have a quick blade change feature spring-loaded push-button opener. It is designed to fit the hand allowing maximum grip and minimum wrist distortion.The blade slider is held permanently in place whilst a magnet holds the working blade in place. Spare blades are held securely so there is no edge damage and no rattle featuring a hinged opening mechanism.This knife has an optimised cutting angle to minimise fatigue and includes magnetic blade retention and storage for up to 5 blades.Patented quick blade release for easy renewal of sharp blade edge.  PTDIRW10504236