MANUAL SURVEYOR High precision mechanical instrument, essential for the model planning stage, to locate the path of insertion, layout reference points and the insertion of clasps in mobile dentures. All versions are fitted with a solid base, a rigid stainless steel column, a model-holder with adjustable plate and a complete set of accessories. The model holder can be free-sliding or mechanically fixed to the base. Version fitted with one rigid arm, ideal for attachment positioning. A double-joint arm can be further added to complete the instrument