2Pcs Metal Standard Letter Size Notebook 3-Ring Binder Replacement Kit - 25mm (26 Base Width) with 3 O-Rings | Loose Leaf Binding Spines Combs for Personal Organizers, Planners & DIY Projects | Perfect for Office, School & Home Organization

Shuokecrafts Standard Letter Size 3 O Ring Binder Mechanism Dimension Overall length: 10.9 Inch ; Ring distance :108/108mm=4.25/4.25 Inch Ring Inside diameter 16mm, 20mm,23mm,25mm,30mm,32mm,38mm,50mm,65mm,76mm(from 0.6" to 3") 2 holes distance: 270mm=10.6 Inch Base width: 20mm=0.8 inch,we also have 26mm=1 inch,36mm=1.4 inch base width. Surface Treatment It was nickel plated,the color can last a long time . ****** And we also have gold and black color(Asin:B091PQ713M). ****** Material Iron material,it's durable . Usage Used for diy planners,Notebook,etc. Accessories and Usage Example Rivets Install Tool Common Packing :Ring Binder Mechanism with Rivets（6mm length） If you want other sizes rivets ,plz search Asin: B0BV118NP5,it includes a lot sizes of rivets for ring mechanism. As common, you also need these tools to attach the rivets with ring binder mechanism. (plz search B09P1RQ1BS). Double cap rivets the Clips with double cap rivets : plz search Asin: B0CFYFKZF6 And we also sell double cap rivets 100pack,plz search Asin: B0CFYDVK2G This type is also very easy to install(first drill holes,then long part one in the hole ,then use hammer or tool to strike it. Chicago Screws And we have other 4 Asins with screws in this page. 1) M4x3mm screws (Asin:B09WB1H11H); 2) M4x4mm screws (Asin:B09QBSYM13); 3) M4x5mm screws (ASIN:B09QKFSMPJ); 4) M4x6mm screws (ASIN:B09QKDV4V2). These SKUs is easy to install. ***If you want other sizes screws,plz search ASIN B0BVLCYN68,it has 3mm to 12mm screws. Usage Example(Notebook,Planner,etc) Like this picture, You can attach the ring mechanism with the rivets by the tools we suggested(ASIN:B09P1RQ1BS) ,the cover is plastic ,and you can attach it into leather,etc. More easiler,you can install the ring mechanism with Chicago screws. Letter Size 3 D ring binder mechanism 20mm Letter Size 3 D ring binder mechanism 25mm Letter Size 3 D ring binder mechanism 30mm Letter Size 3 D ring binder mechanism 65mm Letter Size 3 D ring binder mechanism 76mm Add to Cart Add to Cart Add to Cart Add to Cart Buying Options Customer Reviews 4.4 out of 5 stars 16 4.4 out of 5 stars 16 4.4 out of 5 stars 12 3.8 out of 5 stars 17 3.0 out of 5 stars 9 Price $13.99$13.99 $13.99$13.99 $17.99$17.99 $21.99$21.99 — no data Size Letter Letter Letter Letter Letter Capacity(Inner Height) 0.8" 1" 1.2" 2.5" 3" Base Width 0.8" 0.8" 1" 1.4" 1.4" Rivets Installation Machine 2 Rivets Installation Machine And if you want to install a lot of rivets ,you can use this kind of machine.

The Package includes 2pcs A4 size metal ring mechanism

Overall length 11 inches=277mm(standard letter size);

Ring inner diameter from 16mm to 76mm ,Ring distance 108mm/108mm,,2 holes distance 270mm,base width 20mm ,26mm

Iron material,nickel plated,3 O ring,round ring binder mechanism

Used for diy planners.