With careful use of good

The Stiftausdrücker does not come with instructions. That is the reason for frequent failures.
One has to carefully lead steel pin in the recesses (pin ends) on the side of the watch strap in the direction of the arrows attached there and turn the spindle of the handle with little force. You end up next to the pin to be expressed and Applying too much force, then bends the steel pin and becomes unusable. Vertical can adjust the device within narrow limits by the screw on the side at the height of the watch band.
One should operate the appliance only on a large white cloth. With Casio watch straps example in bracelet per pen a tiny metal sleeve is attached that clamps the pin. This fall out when you open the tape, which you hardly notice. Does the sleeve lost, the pin can not be permanently incorporated. So no part may fall to the ground. The 2-mm midgets are on the floor almost impossible to find.
One should also watch prior to use one of the videos from the Internet.
For the lack of instructions there is a point deduction.