Bob's Knobs Collimation Screws for C8 f/10 Secondary with Metric Collimation Screw Threads (not for EdgeHD or HyperStar)

Collimate your Schmidt Cassegrain Telescope without special tools when you use Bob's Knobs! It's easy: Just grab a Bob's Knob Collimation Thumbscrew and turn it. You can even do it while looking through the eyepiece on many scopes. You'll never drop that pesky little Allen wrench or screwdriver into the grass again. Installation is a snap with the included instructions, and you can undo the modification at any time if you wish. The factory dust cover will fit normally with Bob's Knobs installed on your secondary.

• Installation is a snap with the included instructions
• Modification can be undone at any time
• Knobs are crafted from black plastic, black oxide steel (black) and/or stainless steel (silver). These Knobs are the black oxide steel version.
• No Tools required to perform your collimation!