Cawi-Spiral Drill Grinder Grinders - all-models manual. those listed including the N4-90, N4-60, S4-60, N4-90Z, N2, N3-60 and NL2-60. A very detailed and very clear 115-page Operation & Maintenance Manual with Parts Manual as Exploded-component photographs and electrical schematics. Includes two copies (12 pages) of the maker's detailed and well-illustrated Sales and Technical Specification Catalogue. Enlarged from A5 to A4 for clearer reading, pictures and diagrams.