Dart Reducing Ring offers quality and convenience. The ring allows blades to be compatible with machines when the bore size differs for a precise and safe fit. The ring has been accurately machined with reamed bores and splined outside edges ensuring a perfect fit. This Dart Reducing Ring enables a 20mm bore to be compatible with a 16mm bore machine and is 1.1mm thick. The ring should only be used with Dart saw blades and extra care must be taken when mounting saw blades with a reducing ring.