Delta Rockwell Millers: Vertical, Horizontal and the Horizontal with a Vertical Head. A 92-page Data Pack with Combined Manual for the Models 21-100 Horizontal, 21-120 vertical and 21-122 Combination Horizontal and Vertical. Also covers the 52-020 and 21-820 versions - but not the latter's variable-speed table-drive system. Instruction Manual, Maintenance Manual, Exploded Parts Diagrams, several detailed electrical diagrams and copies of two Sales, Technical Specification & Accessories Catalogs.