The Renzetti magnetic fly tying ruler is a great addition that will affix to any steel vise base or magnetic surface.  With measurements in both inches and centimeters it is perfect for measuring materials to ensure your flies are consistent.

 

Made in the USA

 

 Warning: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov