Airflo Air-Lock Indicators
These indicators are the perfect solution to kinked leaders and poor drifts. Just remove the knob, insert your leader into the groove and screw back down. Alternatively you can run your leader thru the knob and down to your fly, this will give you a perfect 90 degree drift every time. No need to remove your fly to add these indicators and they are a cinch to adjust.
Sold individually $2.50 each.