These stainless steel knobs replace the small plastic aiming knobs on the Telrad reflex finder.
1. Tighten the three factory knobs by hand until they become slightly harder to turn. Do not force them.
2. Remove one factory knob and replace it with a Bob’s Knob. Repeat for the other two factory knobs, one at a time.
3. Loosen the new knobs two or three turns.
4. Mount the finder on your telescope and align.