Although this ruler can function by itself as a traditional ruler, it has some extra capabilities. Specially designed holes on the ruler allow it to be rotated around a center pin, allowing you to use it as a Compass and when used in conjunction with the Degree Scale tools from Circle Perfect Tools, you can quickly rotate, mark and draw straight lines at measured angles (i.e. Goniometer).

• Specialized ruler with drilled holes in certain locations for easy rotation around a center pin hole
• 0-18" ruler with increments marked every 1/8" / 4mm
• Draw lines, circles (Compass style), and take measurements from a center pin hole
• Can be used in conjunction with Circle Guides and Degree Scales made by Circle Perfect Tools
• Unique ruler design which includes reverse measurements from center of ruler

Specialized ruler with drilled holes in certain locations for easy rotation around a center pin holeCircle Perfect Tools, LLC