Things You'll Need
Instructions
Purchase a packet of locking pin backs that includes the locking pin back tool. Locking pin backs are tiny metal cylinders with a hole through the sides. The locking pin back tool is a small "L"-shaped piece of metal that resembles an allen wrench.
Remove the backing that came with the pin. Locking pin backs replace standard pin backs. Put the standard pin backs away, in case you ever want to use them again.
Lay the pin on a flat surface, with the pin facing up.
Place the open end of one of the locking pin back tubes on the pin. At this point, the pin back is standing on end, not laying on its side. Situate the pin back so that it is straight and not leaning to either side.
Hold the locking pin back in place with one hand, and hold the locking pin back tool in the other hand. Carefully slide the long end of the tool through the holes in the sides of the pin back.
Twist the pin back tool clockwise to screw the locking pin back on. Do this gently, without excess force. Twist only far enough to feel some tension. Locking pin backs are threaded inside, and use those threads to hold on to your pin. If you twist too tightly, the threading becomes stripped, and the locking pin back will not hold your pin securely.