P&P Office Waste Paper Processor help to convert paper to pencil, works on the principle of printer which takes blank paper as input and prints the desired output. Similarly, this one takes any paper of prescribed size and produces pencils on the other side. As you can see from the pictures, there is input slot which takes paper and the pencil exit slot which generates pencils. Like in printers you should refill with lead powder or graphite powder to generate lead pencils. There is a slot for pencil sharpening where you can sharpen the pencils directly. It is provided with various modes like Manual and Auto to choose from as per your convenience.