This is an outstanding piece of which has been made using ball bearings from the Mazda RT24-P racing car gearbox and the centre ball bearing comes from the Ford GT race car gear box.  There is also some 'steel dust' sprinkled in there too which gives it extra glimmer under light.  A very interesting piece indeed.  These have all been resin set in a silver plated bangle which has an unusual opening at the top.  The circumference of the bangle measured on the internal rim is approximately 17cm.