No knots, no damage to the line
Ringbooms are piano wire stays with an O-ring for SnapAway clips.
They act as props to hold SnapAways and lure lines clear of kite lines. Simply looped on to the line, they should neither slip nor fall off.
Standard piano wire boom for use on any linkage with an adjustable clip
Stiffer than piano wire booms—may need an extra turn or two of the flying line when attaching