The Stanley 10-819 retractable knife has a die-cast aluminium housing combines maximum strength with amazing lightweight properties. Solid, secure handling. Extra-large hand grip and the diamond-shaped textured handle provide a sure-grip whatever the conditions. On-the-job efficiency. Holds up to 15 blades or a dispenser of 10 blades. Maximum flexibility. Chunky dial allows you to control the width of the knife opening, giving you a sure feel when using extra heavy-duty blades. Fast blade change. Spring-loaded swivel opens the knife wide for quick and easy blade change. Plus the magnetic nose holds the blade in place whilst its being changed. Retractable blade.