Staedtler Mars Drafting Head For 661 A3 Drawing Board 660 20

Drawing Board Accessory Staedtler Mars 660 20 Drafting Head For 661 A3 Board
Drafting Arms are designed to be used with our DIN A4 and DIN A3 drawing boards, for example to facilitate uninterrupted drawing of right angles. These products are equipped with two transparent rulers with double-sided, opposite-running scales. Our drafting heads also have opposite-running protractor scales from 0 to 90 with additional marks at 7 and 42 for dimetric projection. Drawing angles can be set at 1 intervals. For precise results, these products include a Stop/Go push-button for easy setting at the desired angle.
Features:

• 90 with additional marks at 7 and 42 for dimetric projection.
• 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 ruler arms 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 15 intervals.
• Uninterrupted drawing of right angles possible.