- With 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
