Brierley ZB50 Drill Grinding Machines: Operator's Instruction Manual and an illustrated Parts Manual as exploded-component drawings that show the relationship and positioning of all parts. The package also has additional Technical Bulletins produced over the years by the Company that detail a number of important aspects of drill-sharpening work. Also included is a large set of detailed Sales and Technical Specification Catalogues for all other Brierley Models. . This represents a complete data set for the machines.