Compass Problems??

I have the great privilege of teaching high school geometry to special education students this year. As we were doing some preliminary learning about radius and diameter we began to draw circles with a compass. There were many of my students who struggled using these tools because of their weak fine motor skills. I think we are all familiar with the average hand writing of a special education student. Needless to say holding a sharp point down while trying to swing a pencil around without having a paper move or tear is not an easy task for them. I began searching the internet to find an alternative for them and stumbled across a tool I had not seen before. As an extra bonus it was very affordable at only $1.49 each. I ordered about 15 of them and many of my students love them, and best of all I don't have to hear them complaining about the compasses "not working".  Here is the link to buy them on Amazon.  I also found a great deal on these nice metal rulers for only a $1.50.