Collimating Schmidt-Cassegrains or Newtonian telescopes is now easy with Bob's Knobs collimation screws, without tools. After tightening the screws, simply turn the screws to properly adjust the telescope. Meanwhile, you can even see through the eyepiece and never again drop the screwdriver in the grass or spend minutes looking for it because no tools are needed.
Attaching Bob's knobs is very easy and can be undone at any time.