Trying to draw a circle bigger than your compass leg and getting a wobbly mess? This Arco set handles it. The hinged leg and needle shoe keep the point locked in place, and the extension arm pushes your max diameter to 433mm without the whole thing bending. Seven pieces, hard plastic case with a clear lid so you can see what's inside at a glance. Built for the bigger geometry work that a basic compass just can't reach
| brand | STAEDTLER |
| model | 559 ARCO |
| piece_count | 7pc |
| max_circle_diameter | 335mm standard / 433mm with extension arm |
| case_type | Hard plastic with transparent lid |
| category | Classroom Supplies |
| intended_use | Large-diameter circles, arcs, geometry |
