Case-It D-146 3-Inch Zipper Binder

Last updated date: July 8, 2021

DWYM Score

9.3

Case-It D-146 3-Inch Zipper Binder

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We looked at the top Binders and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Binder you should buy.

Update as July 8, 2021:
Checkout The Best Binder for a detailed review of all the top binders.

Overall Take

A durable cloth cover and full-length zipper protect your papers in this practical and versatile binder. With a additional pockets on both the interior and exterior as well as a shoulder strap, this is a multi-functional organization solution.


In our analysis, the Case-It Case-It D-146 3-Inch Zipper Binder placed 4th when we looked at the top 7 products in the category. For the full ranking, see below.

From The Manufacturer

The Case-it D-146 Mighty Zip Tab Zipper Binder is an efficiently-designed 3-ring organizer with a five-color, tabbed expanding file folder. This large-capacity binder also features a gusseted zipper for easy access plus a carry handle and shoulder strap for versatile mobility. The zipper has a unique angled design to make it easier and quicker to zip things up when packed with your important papers and materials. The D-146, like all of Case-it's binders, uses Kraft board instead of PE board to give its binders a firm, stiff shape that won't buckle or warp. The spine is specially designed so that your binder can lay flat when open, making it easier to add or take papers out, and to take notes in. Case-it produces quality binders offering unique organizational tools for school or home use.

An Overview On Binders

Binders can be indispensable organization and storage tools for academic, office or business use. These practical items have been around for over 150 years, and their design has not varied much over the years.

Binders differ by ring style and number, width, number and type of pockets and color, as well as some smaller details. For example, some have a hole in the spine to make it easier to remove them from crowded shelves. The most common design features three round, evenly-spaced rings — but especially for larger binders, a D-shaped or slanted D-shaped ring design is common as well. This design makes it easier to turn to specific pages when the binder contains a large number of documents.

When selecting a binder, consider the materials, as well as what size and ring design is appropriate. Binders come in sizes ranging from half an inch thick to four inches and are commonly made of plastic. Some of these plastics may be plant-based or otherwise eco-friendly, which gives options to the environmentally conscious. Most binders also contain a chipboard inside the vinyl or plastic covers, though some are simply made of thick material.

Another consideration is the customizability of the binder. Many binders come with clear plastic pockets on the front, back and spine. These can be easily labeled or customized by inserting printed paper into the pockets. You may wish to color-code your binders, too.

The Binder Buying Guide

  • Make sure the ring configuration matches the size, shape and position of the holes in your paper or the hole puncher you plan to use. While the standard three-ring binder is most common, there are a variety of other styles.
  • For additional organization, some binders include pockets, expanding files, or other storage solutions.
  • There are also binder inserts for sale that can hold your writing utensils, cards or other small items.
  • Look for acid-free non-stick materials that won’t imprint ink from the paper contained inside.