Description
- For use with the drawing boards 661 A3 and A4
- Single-handed use
- Stop/Go push-button for easy setting at desired angle and freewheeling
- Two transparent rulers with double sided, opposite-running scales
- Parallel guide lines serve as hatching aid
- Opposite-running protractor scales from 0 – 90° with additional marks at 7° and 42° for dimetric projection
- Automatic settings at 1° interval
- Uninterrupted drawing of right angles possible
