For drawing straight lines, or certain angles a ruler, a set square and a protractor are required. The tools included with the TactiPad are specially designed, and have 2 centimeter wide holes and grooves to exactly fit over the knobs on the frame. Apart from that, the drawing tools are made with a rubber underside, which prevents them from slipping over the drawing surface.
![The TactiPad tactile drawing board with its drawing tools](https://thinkable.nl/wp-content/uploads/2016/05/TP-640-1-8-300x200.jpg)