Sell Professional Compass, Compass Geometry Set with Lock, Math and Precision Compass, Metal and Durable for Solid and Plane Precision Tool, Fit for Drafting, Drawing, Measuring(blue) best price

PRECISION MATH COMPASS - Made for mathematical geometry and art drawing. Unique design to prevent slip while drawing. PRECISE ADJUSTMENT - The adjustment knob enables students to produce accurate geometric constructions. You can lock the compass in place and have it actually stay when writing. ADJUSTABLE SIZE - Maximum diameter up to 10 inches, minimum for 1/8 inch. You can draw all kinds of circles. ALL-METAL MATERIAL - Made from high quality parts and solid construction, durable enough to last for a long time. Three additional leads are easy to replace when needed. Stability: The compass with spring bow head and thumbwheel could prevent from unintended slide. colour: blue/black Materials: Metal Package Contents: 1 * Precision Compass 2 * Spare Screws 3 * Spare Lead<br />Only the above package content, other products are not included.<br />Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.