Folding Extension Ruler

Top Definition

A 6' a hard-wood folding ruler painted yellow with the measurement markings in black. The extension part is a metal (brass) piece that slides out from the first leg of the ruler and extends 6" to aid in making inside or hard to reach measurements. While the "Slipstick" term is normally associated with the slide rules of the pre-calculator age, the term Slipstick refers to the sliding metal extension on the folding ruler.

Folding Extension Ruler Image