The copying ring with a diameter of 30 mm is ideal for working with cutters up to 25 mm in diameter. It can be perfectly centred with the fastening screw. Indispensable when working with templates. For gauging routing templates, inserted in router without using tools. the copying ring can be precisely centred with centring mandrel 492187. for OF 900, OF 1000, OF 1010, OF 1010 R, KF