Brierley ZB Drill Grinders (ZB10, ZB11, ZB20, ZB21, ZB25 and ZB32). Operator's Instruction Manual and an illustrated Parts Manual as exploded-component drawings that show the relationship and positioning of all parts. There were early and late manuals for these machines and both are included as well the additional Technical Bulletins produced over the years 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.