PTFECOATED DOUBLE RING SWIVELS(Size 11)The Korda Size 11 PTFECOATEDDOUBLE RING SWIVELhasbeen designed to provide maximumflexibility when using a helicopter set up. The extra ring helps to reduce tangles whilst the PTFEcoating ensures a super-smooth improved rotation.ThePTFE(Polytetrafluoroethylene)coatingis a synthetic polymer which has one of the lowestcoefficients of friction of any solid. This makes it the perfect coating forourswivels as it reducesfriction between the barrel and swivel eye, allowing them to rotate freely which reduces tangles.