Irwin FK150 Folding Utility Knife Inc 3x Blades 1888438 The Irwin FK150 Folding Utility Knife features patented Blade Lock Technology, which is designed to keep the utility blade securely locked in the knife handle, and provides the user with the ability to change blades only when the release button is engaged and the blade holder is in the 45° open position. It has a proprietary design that addresses the most frequently cited user frustration, that of preventing the blades accidentally pulling out of the handle during use.  Supplied with 3x Blades.  FEATURES Patented BladeLock Technology keeps blade locked in place Blade storage that holds up to two additional blades Liner lock for quick one-handed operation Wire stripper for built-in convenience 3 Blades included