I loved 3DKarma's camera arm, but I ended up needing to use a mini tripod to get the right angle and distance. These parts allow you to hook the camera from 3DKarma's design to a tripod. There is also an optional lens holder. I found putting a +3 lens in front of the camera gave it a useful focal range for print monitoring. I used a lens from a pair of reading glasses I picked up at the local drugstore.