LongLife 1000V-Insulated Folding Rule

Intended for use by electricians, this folding rule is insulated to protect against harm from incidental contact with voltages of up to 1000VAC/1500VDC. Strong and lightweight, it won't bend or twist like a tape measure, helpful when you are working alone. The rule surfaces can be marked with a pencil, allowing you to use it like a story stick for direct reference.