Oros strike indicators enclose fastening hardware inside of two foam hemispheres. When closed, the foam compress creating a pressure fit lock that keeps it on the line and in place, without kinking. Large screw threads make securing it to the line effortless, and it it's even easier to lock in place with wet hands.
Oros Screw On Strike Indicators – Murray's Fly Shop
Oros Screw On Strike Indicators - 3 Pack Or Individually Sold - Spawn Fly Fish– Spawn Fly Fish
Indicators and Split Shot - Royal Treatment Fly Fishing
Oros Strike Indicators- Singles Red/White – Dakota Angler & Outfitter
Oros Strike Indicators
Oros Strike Indicator 3 Pack – Out Fly Fishing
Oros Strike Indicator - 3-Pack - Fishing
OrosFlyFishing, Fly Fishing Strike Indicators, Finally Perfected