The Stanley Sport Quickslide Utility Knife features two blade types. One end has a 75mm (3in) serrated sport blade ideal for home, garden and leisure applications. The other end has a standard utility blade for multi-purpose cutting. It has a one handed operation blade slider that extends the blade quickly and easily with a wide thumb grip for easy operation. For security the blades cannot be used simultaneously. Specification: Length: 120mm This Stanley QuickSlide Sport Utility Knife comes with holster and blades for better value. STA010813