The spine of a ring binder is called a "ring binder mechanism". Most often this spine is made of metal, but sometimes it has plastic components as well. These loose ring binder mechanism spines are commonly used to make ring binders, however, can also be used for clip boards, flip charts, crafts, and more. There are 3-ring, 2-ring, 6-ring, and more options available, all with different sheet sizes and hole spacing that they work with. Here is a list of the various ring binder spines we offer...

• Letter Size 3-Ring Binder Mechanisms

    - Intended Sheet Size: Letter Size [8 ½" W x 11" H]
    - Ring Sizes Available: 1/2", 3/4", 1", 1 ½", 2", 2 ½", 3", 4"
    - Colors Available: Silver, Black, Brass/Gold
    - Ring Spacing: 4 ¼" Between Rings [Center to Center]

• Half Size 3-Ring Binder Mechanisms

    - Intended Sheet Size: Half Letter Size [5 ½" W x 8 ½" H]
    - Ring Sizes Available: 1/2", 3/4", 1", 1 ½", 2"
    - Colors Available: Silver
    - Ring Spacing: 2 ¾" Between Rings [Center to Center]

• 2-Ring Binder Mechanisms

    - Intended Sheet Size: Letter Size, Short Side [8 ½" W x 11" H]
    - Ring Sizes Available: 1", 1 ½"
    - Colors Available: Silver
    - Ring Spacing: 3 ⅛" Between Rings [Center to Center]

• 6-Ring Memo Size Binder Mechanisms

    - Intended Sheet Size: Memo Size [4" W x 6" H]
    - Ring Sizes Available: 1/2", 3/4"
    - Colors Available: Silver
    - Ring Spacing: 3/4", 3/4", 1 ½", 3/4", 3/4"

• 3-Ring Plastic Letter Size Binder Mechanisms

    - Intended Sheet Size: Letter Size [8 ½" W x 11" H]
    - Ring Sizes Available: 1"
    - Colors Available: Black, Off-White, Gray, Blue
    - Ring Spacing: 4 ¼" Between Rings [Center to Center]

Kinds of Ring Binder Mechanisms


Mallory Morsa, Binding101 Product Expert About the Author • Mallory Morsa is the product expert and content specialist at Binding101, and has been a valued team member since 2008. She started her career here in customer service, moved onto sales supervisor, product management, and then onto content. She takes a hands-on approach to products, and truly gets to know how every item works before she writes about them, with a goal to give you all of the honest information you need to make a confident buying decision. She has a bachelor's degree with a focus on management and marketing, and has been a writer, photographer, and videographer for many years. In her free time, she loves to read by the pool, volunteer at the local animal shelter in the kitten nursery, and snuggle her three furbabies while she binge watches Netflix.