Alvin - Speed Bow Intro Compass with Beam Bar

Speed Bow Intro Compass with Beam Bar

Draw precise circles up to 12 inches with double-jointed German compass

Knee joints lock the beam bar precisely where you need it, eliminating the drift and wobble that plague cheaper compasses when drawing large circles. This German-made compass extends to draw circles up to 12 inches in diameter, maintaining stable geometry whether you're drafting architectural plans or laying out mandala designs. The beam bar construction distributes pressure evenly across the span, so your compass point stays anchored while the pencil leg sweeps smooth, consistent arcs.

Double-jointed legs adjust independently for fine-tuning radius and angle, giving you control over both size and tilt. The pencil holder accepts standard leads and grips them securely, no slipping mid-circle to ruin your line. Metal construction throughout means this compass handles repeated adjustments and pressure without loosening or warping, the kind of durability that matters when precision work is routine rather than occasional.

Extra leads come included so you can start working immediately. Students working through geometry proofs get the same reliable performance as professionals drafting construction documents. The beam bar stores compactly when not needed, converting this back to a standard compass for smaller circles and detail work.

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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