The rings are manufactured utilising a high-grade, corrosion-resitent alloy. They pass through various manufactoring procedures and are then drum polished to ensure smoothness as well as maximum static friction, thereby guaranteeing the highest knot strenght. Finally they are anodised, resulting in a grey black sheen that refelcts very little light. The rings increase the breaking strain of connetions up to 100%. The rings simplify changing tippets and avoid repeatedly shortening the flyleader. They are well suited for use in combination with dry fly leaders; the rings are very light and are carried by the waters surface-tension. Also enclosed are mounting instructions, knot sketches and breaking strain table.