Start with a long strip of metal (like a street cleaner bristle, welding rod, cloths pin, coat hangers, and the best a car wiper ). The one in this example is nineteen inches long.
Step 1: First bend the metal a few inches more than in half. DO NOT BEND ALL THE WAY SO THAT BOTH ENDS ARE TOUCHING. Use a bread tie (or something of the sort ) to keep both ends from springing back apart.
Step 2: At up to about one and half inches from one end take and twist 90 degrees with two pair of pliers (like a twist that you would do on a twist-flex tension wrench).
Step 3: Bend about five and a half inches on the end that is not twisted
Step 4: Loop the part you just bent around the opposite side just after the 90 degree twist.
Step 5: Take off the bread tie and add a old pen or black tape for the handle. FINISHED!!!
You can probably figure out how to put the clicker in the pen but if you can't, here's how. Just undo the loop you made, unbend a little bit and put through the pin. Then redo the loop.
You use it by pulling the lip down and slide your finger off the side so it pops up quick hitting all the pins in the lock at once. A run on sentence but descriptive none the less.