Centre Positioning Dies Durston 3-19 mm

Centre Positioning Dies – 3-19 (17 Pcs) (For Disc Cutter 24-297) from Durston Tools. Use this centring die set with your Durston Tools disc cutter to make perfectly centred ring (washer) components. Simply cut a hole in your sheet with a punch the size of your desired inner ring diameter. Then move the metal to the larger punch size and use the appropriate centring die to centre the metal. Then clamp the metal securely and punch a hole with the punch size of your desired outside ring size. 
See video 
CENTRED RING