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.
There are no small parts to fumble and lose. It’s streamlined design is centered on the line for balanced casting. There is no exposed fastening hardware or posts sticking out to create drag or tangle line.