Check the listing for details. Fake Knife Magic Prop Prank Retractable Dagger Joke Trick Disappearing Blade Toy. Color: As Shown, Condition: New. Listed at 5.79 USD. Description:Interesting design: the disappearing dagger features a small plastic knife with spring loaded retractable blade which slides into the handle as you stab your victim and slides out again when you pull away, your friends will be shocked by this little gadget novelty toy. A classic gags：you can fool your friends and make them laugh by playing this fake dagger, but not suitable for children under 14 years of age. Size: About 7.28inch Long Package Content:1x Fake Retractable Knife you can click here to find more interesting toys in our store!Description:Interesting design: the disappearing dagger features a small plastic knife with spring loaded retractable blade which slides into the handle as you stab your victim and slides out again when you pull away, your friends will be shocked by this little gadget novelty toy. A classic gags：you can fool your friends and make them laugh by playing this fake dagger, but not suitable for children under 14 years of age. Size: About 7.28inch Long Package Content:1x Fake Retractable Knife you can click here to find more interesting toys in our store!