To use the pinning block, put the head of the pin bearing a freshly pinned insect into the shallowest hole of the pinning block. Push on the pin until its head is at the bottom of the hole. This will force the insect into a position 1/4-inch down on the pin. If the back of the insect is not resting on the block, that means the insect is too low. (Remember, the insect pin is upside down in the hole.) Push the insect downward on the pin until the insect's back is in contact with the block.
To position labels on the pin, put the label on the pin. Then put the point of the pin in either of the other two holes. Use the same hole for all the insects in your display collection. You can later change your mind about positioning labels, but not about positioning insects after they have dried on the pin.