Koala Tools | Ring Ruler 360 - Circle Stencil & Templates Tool | 3"- 6" Adjustable Diameter - Geometric Tool for Drawing Circles

Koala Tools | Ring Ruler 360 - Circle Stencil & Templates Tool | 3"- 6" Adjustable Diameter - Geometric Tool for Drawing Circles

• ADJUSTABLE CIRCLE CREATION: Mathematical ruler that creates perfect circles seamlessly in seconds. 3 to 6 inch diameter range.
• SCHOLASTIC & CRAFTY: Handy for kids and students at school as a 360 degree protractor. Ideal for sculpting, woodworking, quilting, sewing, and gourd design.
• HIGHLY VERSATILE: Works with lead pencils, pens, markers, or airbrush. Usable on either flat 2D or spherical 3D objects (vases, bowls, ornaments).
• DURABLE CONSTRUCTION: Sturdy plastic remains strong yet flexible for circular drafting or cutting arcs and curves.
• PRECISION CALIBRATION: Measures diameter, arc lengths, and circumferences with extreme accuracy.

This size-adjustable circular ruler provides the ability to draw or measure circles and arcs by simply expanding and contracting it to the desired circumference. It snaps easily into place for a semi-permanent hold and displays both diameter and arc length measurements. It can be used to measure and inscribe onto 3D objects like spheres, cylinders and cones. Its flexible plastic construction is safe for all ages, as it has no needle or sharp points. In US. Standard measurements.