Letter size ring binder mechanisms are the metal spine pieces from binders. These binder parts (binder spines) pieces are available in 3-ring for letter size 8.5" x 11" papers in ring sizes from 1/2" up to 4" in silver, black or brass.
Product Name: 3-Hole Binding Spines; Package Included: 10Pcs Binding Spines. DIMENSIONS: Hole Pitch: 2cm; Rind Diameter: 2cm; Sheets Capacity: about
10Pcs Metal 3-Ring Binding Spines Combs, Loose Leaf Binder DIY Photo Album Rings Book Calendar Round Circle, 0.75-Inch Spine Diameter, Black
Binder Rings, 3 Ring Binder Spines
Binder Mechanism - Canada
Avery® Durable View 3 Ring Binder - 1 1/2 Binder Capacity
High-Quality Red Linen 3-Ring Binder - 1 Inch
Ring Binder Mechanism Overview & Options
Medical & Patient Charting Systems - Binders - Omnimed
Whiteboard Ring Binders 2 & 3 Holes - Magiboards USA
Magnetic Binder Rings, 3 Rings, 1.5, 20 lb Pull Strength.
