• This Baader 2" Clicklock Adapter is designed specifically for all Pentax refractors using the M84 thread.
• The eyepiece holder can also be detached from the M84 portion to expose M68 threads.  This permits use of Baader's M68 Extension Tube #2458210 for correct spacing when imaging. 
• No more cumbersome thumbscrews or bulky holders!
• The Baader 2" Clicklock Adapter locks eyepieces and accessories into place with a simple twist.
• So strong they can literally support an entire telescope without slippage!

Baader 2" Clicklock Adapter Features:

• 20 degree Rotation is all that is required.
• Very low force required to rotate.
• Absolutely no sag or misalignment, even for heavy and long accessories.
• Versions to fit most popular telescopes.
• Warranty: 24 months