Helix - Protractor with Swing Arm

Protractor with Swing Arm

Measure and draw precise angles up to 180° with integrated swing arm

Measuring angles becomes straightforward when you can see both the baseline and the arc simultaneously. This transparent protractor positions a 6-inch swing arm directly over printed degree markings, eliminating the guesswork that comes from trying to align separate tools. The arm pivots smoothly through a full 180-degree range, maintaining stable contact with the paper while you mark angles or verify existing ones.

Durable plastic construction withstands the repeated adjustments and pressure that come with technical drawing and geometry work. Transparency lets you position the protractor precisely over existing lines and reference points without obscuring your work. The extended arm length provides enough reach for larger diagrams and technical drawings while remaining compact enough for standard notebook work.

Students working through geometry problems and drafters checking architectural angles both benefit from the direct visual alignment this design provides. The swing arm locks your measurement in place, so you can draw confident angle lines without the tool shifting mid-stroke. Whether you're constructing geometric proofs or laying out technical illustrations, this protractor handles the fundamental task of angle measurement with practical efficiency.

Architecture and Drafting

Architecture and Drafting Purchase Guide

Architecture and Drafting Supplies

Drafting Tools - Precision instruments including T-squares, triangles, and compasses for creating accurate technical drawings and architectural plans.

Modeling Materials - Balsa wood, basswood, and other materials for creating architectural models and prototypes.

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