This copying ring is used when routing a semi-covered SZ 20 dovetail joint and open SZO 20 dovetail joint. A perfect system with the templates for semi-covered or open dovetail joint. Copying ring for the jointing system VS 600. appropriate for the SZ 20 and SZO 20 templates of the VS 600 jointing system|the copying ring can be precisely centred with centring mandrel 492187. for OF 900, OF 1000, OF 1010, OF 1010 R