I got a set of 4 squares from http://www.chronos.ltd.uk/acatalog/info-150683.html
£24.10 including vat, delivery.
" A set of four Precision Quality Graduated Engineers Squares
All squares are precision ground and the blades are hardened . The beams and blades are ground for parallelism . (BS939 Grade B)
The accuracy is less than 0.001" deviation per inch over the entire length of the blade . Extremely useful for setting up workshop equipment .
Contents 2 - 3 - 4 - 6 "
Graduated on both sides " I have a Swiss Pfeil marking knife see Ebay item number 311069099043
£24.10 including vat, delivery.
" A set of four Precision Quality Graduated Engineers Squares
All squares are precision ground and the blades are hardened . The beams and blades are ground for parallelism . (BS939 Grade B)
The accuracy is less than 0.001" deviation per inch over the entire length of the blade . Extremely useful for setting up workshop equipment .
Contents 2 - 3 - 4 - 6 "
Graduated on both sides " I have a Swiss Pfeil marking knife see Ebay item number 311069099043