One of Weems and Plath's best selling traditional parallel rulers is this 15 inch Brushed Aluminum Arm Parallel Ruler.
This sturdy acrylic parallel ruler also includes a protractor scale. It is easy to use, and is a necessary tool for every seagoing navigator.
- Brushed aluminum arms and polished aluminum handle.
- Milled with beveled edges
- Includes protractor scale
- Weems and Plath lifetime warranty