The shift of your hand is all it takes to set the Ani-Motion Switch Blade in motion, The realistic, yet safe plastic black is on a special lever and is held in place with two wrist bands, A night stalker costume or Jack the Ripper costume are two Halloween costumes that come to mind as the perfect outfit for this Ani-Motion Switch Blade accessory, Includes: An ani-motion switch blade with arm bands, Material: ABS with EVA blade, Warnings: Choking hazard: Small Parts, Not For Young Children, SKU: CSTSP12915