Rulers

The Staedtler Mars Variomatic Drafting Head 660 20 offers a smooth, one‑hand operation with a built‑in stop‑go button for precise angle setting from 0° to 90°. Its transparent body and adjustable pivot allow quick alignment on A3 or A4 drawing boards, making it ideal for architects, engineers, and designers who need accurate, repeatable angles in their sketches.