- Essential connector between DiAFLX and    Hand-held polishing machines. - Quick and convenient change for DiAFLX    by VelcroTM on the backside.   Outer diameter Specifications Remarks Tyep Arbor 2"(50mm) Flexible Rigid M14 M16 M5/8"-11 M24 Male Velcro glued on 3"(75mm) 4"(100mm) 5"(125mm)