3-Ring Letter Size Binder Mechanisms

With 3-ring letter size binder mechanisms, you can quickly and conveniently bind standard letter size pages that measure 8.5 inches wide and 11 inches tall. Although that is the traditional size used, there really isn't a width limitation, since these are loose binding spines that don't limit you in that way. The spacing of the rings is standard for 3-hole punches, measuring 4-1/4 inches between the rings for easy compatibility. Use ring binder spines as a way to securely bind loose, hole-punched pages, or as a unique way to create swatch books and custom ring binders. You can pair with our binder rivets and rivet setter tool to bind the ring binder hardware onto a custom chip board sheet.

You can choose from metal mechanisms, which are the most popular, in several colors, including silver, black, or brass. The ring sizes range from 1/2 inch up to 4 inches, and may be available in both round and slant-d ring styles. These mechanisms have boosters, sometimes called "ears", that assist with opening the rings, and protect the ring clasp integrity. We also offer plastic letter size ring binder parts that have 1 inch round rings and are available in blue, black, gray, or off-white colors. Simply choose the mechanism style or color you want from below to see the options and get your quality ring binder spines for binding all kinds of applications.

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3-Ring Letter Size

4 Items

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  1. 3-Ring Letter Size Silver Binder Mechanisms (Price per Box)

    • For letter size paper, which has an 11" binding edge
    • Have 3-rings with standard hole spacing of 4
    • Compatible with any standard letter hole puncher.
    • On each end of the binder spine are boosters that assist with opening the rings, as well as rivet holes that allow you to bind them to any cover you see fit;

    Starting at: $48.39

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    Product NameItem NumberPriceQty
    3-Ring Letter Size Silver Binder Mechanisms [1/2" Round Ring] (50/Bx) Item#113RBML012R113RBML012R
    $48.39
    3-Ring Letter Size Silver Binder Mechanisms [3/4" Round Ring] (50/Bx) Item#113RBML034R113RBML034R
    $50.49
    3 Ring Binder Mechanisms Slant D with Boosters [slant d, 3/4", silver, 11" binding edge]113RBML34ADB
    $369.09
    3 Ring Binder Mechanisms Straight D with Boosters [3/4" Straight D Ring] (250/Bx) Item#113RBML34SDB113RBML34SDB
    $329.26
    3-Ring Letter Size Silver Binder Mechanisms [1" Round Ring] (50/Bx) Item#113RBML100R113RBML100R
    $59.79
    3-Ring Letter Size Silver Binder Mechanisms [1 ½" Round Ring] (50/Bx) Item#113RBML112R113RBML112R
    $67.99
    3-Ring Letter Size Silver Binder Mechanisms [1 ½" Slant-D Ring] (50/Bx) Item#113RBML112SLD113RBML112SLD
    $82.39
    3-Ring Letter Size Silver Binder Mechanisms [2" Round Ring] (50/Bx) Item#113RBML200R113RBML200R
    $114.39
    3-Ring Letter Size Silver Binder Mechanisms [2" Slant-D Ring] (50/Bx) Item#113RBML200SLD113RBML200SLD
    $114.39
    3-Ring Letter Size Silver Binder Mechanisms [2 ½" Round Ring] (50/Bx) Item#113RBML212R113RBML212R
    $116.39
    3 Ring Binder Mechanisms Straight D with Boosters [2-1/2" Straight D Ring] (60/Bx) Item#113RBML212SDB113RBML212SDB
    $183.40
    3-Ring Letter Size Silver Binder Mechanisms [3" Round Ring] (50/Bx) Item#113RBML300R113RBML300R
    $132.89
    3-Ring Letter Size Silver Binder Mechanisms [3" Slant-D Ring] (50/Bx) Item#113RBML300SLD113RBML300SLD
    $132.89
    3 Ring Binder Mechanisms Straight D with Boosters [3" Straight D Ring] (72/Bx) Item#113RBML300SDB113RBML300SDB
    $247.41
    3-Ring Letter Size Silver Binder Mechanisms [4" Slant-D Ring] (50/Bx) Item#113RBML400SLD113RBML400SLD
    $219.39
  2. 3-Ring Letter Size Black Binder Mechanisms (Price per Box)

    • For letter size paper, which has an 11" binding edge
    • Have 3-rings with standard hole spacing of 4
    • Compatible with any standard letter hole puncher.
    • On each end of the binder spine are boosters that assist with opening the rings, as well as rivet holes that allow you to bind them to any cover you see fit;

    Starting at: $447.19

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  3. Letter Size 3-Ring Plastic Binder Mechanisms (Box of 150)

    • Feature 3-rings with traditional ring spacing of 4 1/4" between each ring.
    • Made of a durable metal material.
    • Sheet Capacity: 200 Sheets
    • Stack Capacity: 5/8" Thick Stack

    Starting at: $359.39

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  4. 3-Ring Letter Size Brass Binder Mechanisms (Price per Box)

    • For letter size paper, which has an 11" binding edge
    • Have 3-rings with standard hole spacing of 4
    • Compatible with any standard letter hole puncher.
    • On each end of the binder spine are boosters that assist with opening the rings, as well as rivet holes that allow you to bind them to any cover you see fit;

    Starting at: $228.79

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