Technical Graph/Drawing Board A3 Mars – (Staedtler)

– Parallel drafting arm, with double-sided scale
– Convenient single-hand double locking mechanism for setting at any position on the rail
– Twin rail for especially smooth, even gliding of the ruler
– Colour indicator shows whether locked or unlocked
– Sheet clamping strips on both sides of the drawing board for fastening of paper
– Scale with needle hole for precise compass radius setting
– Made of sturdy, break-resistant plastic
– With non-slip rubber feet

Matching carry bag also available from here:
https://copyquick.abigailmarsh.org/product/staedtler-mars-technical-board-case-bag-a3/