Retractable Trapezoid Blade Knife, ProTouch, IRWIN Multifunctional, lightweight, and durable knife for various applications, especially roofing; Quick-change blade mechanism allows blade replacement without opening the knife; Knife handle allows pull-cutting; Hinged compartment stores up to 10 blades; Easy, tool-free blade installation; Even 3-step blade extension for different cutting depths; Optimized blade cutting angle to reduce hand fatigue; Knife handle made of ProTouch material ensures a secure grip and increased comfort during work; Use Irwin Bi-Metal trapezoid bi-metal blades for operation. Material: Steel Length, mm: 235 Width, mm: 67 Height, mm: 31 Weight, g: 160