An extremely handy pocket sized reference booklet
of data charts and tables for the drawing office, toolroom or workshop.
This metric revision publication is produced by
Zeus Precision Charts Ltd, who are members of the British Standards Institution.
The 28 laminated pages contain data on standard
drill sizes and decimal equivalents, tapping drills and clearances for metric
and imperial threads, BS4500 tolerances, hardeners comparisons, jig bO-ring
co-ordinates for equally spaced holes, allowances for sheet metal bending and
Also long tables for sine, cosine, tangents and