Attaching Instrument Head
To attach the instrument head, note that the locking collar has a tab on one half and a screw in the opposite half. Swing the collar fully open, tilt it downward, and start the tab forward into either slot on the instrument head. Simultaneously, rotate the half upward until it becomes flush with the handle.
Close the collar and screw the halves together with the wrench provided. Do not overtighten the screw.
Proper Screw Tightening
Use the Allen wrench in the orientation shown to properly tighten the screw.
Manual:
Download: INSTRUCTIONS FOR WELCH ALLYN 3.5v LOCKING COLLARS
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