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