Day-Timer 7 Hole Punched Calculator Ruler, Black, Large, 8 1/2" x 11"

Ingenious calculator is punched to slip over the rings of your binder. It automatically travels with your planner so you can crunch numbers at your convenience. It doubles as a standard/metric ruler, and is punched on both sides so it can always face up on either side of the rings.

• 7 Hole punched to fit Folio size Loose-leaf binders
• Punched along both edges so you can insert it when and where you need
• Performs basic functions plus square roots, percent, and memory for all your accounting needs
• Doubles as a standard/metric ruler with conversion tables on back for quick and easy reference
• Fits easily in to a folio size planner, 8 1/2" x 11". Calculator measures 2 1/2" x 11" x 3/8" (64 x 280 x 10mm)
• Available in Black