These are fabulously bold.  We have used some swarf (off cuts and shavings) from making engline racing components for the perimeter circle edge.  The middle piece is a Roller Bearing from the Ford GT racing gearbox. 
These are statement pieces that look rather industrially elegant!  A perfect partner with either a dinner suit or a cool pair of jeans and a shirt. 
All our Flinks are made from Sterling Silver, not plated and the 925 stamp is found at the top of the post in both Flinks.
They are gift boxed in a very special, black leather box.
 
Measurements:  The face of the 'Flink' is 18mm and the bearing height from the base of the Flink stands at 10mm