These snapping pens are a great gag. Simply load a single cap into the pen. Latch back the spring loaded metal piece. Close up the pen and give it to an unsuspecting victim. When the pull the pen apart to open it it will go BAMM! Load them up and give them to your friends, or boss. You can also put these anywhere pens are used and sit back and watch you victims jump. Pens CAN be used over and over again. (Requires Caps) Be sure to watch the video deomonstration at the bottom of this page.