MyBinding Black Plastic Binding Combs, Letter Size Plastic Spiral Binding for Notebook, Calendar, Picture Album and Reports - 1/2 inch long, 6 milimeter diameter, 30 sheets, 100 Pack

cheapest price i could find, great company, started to buy there products directly, great quality products, highly recommend them

I really like to be able to fold my textbooks in half, and not have to hold them open when I'm reading. These coils are big enough to allow me to do that.

Great quality coils! Coils are very smooth and easy to use! Will keep buying them for our presentations to investors!

They're clear. They're spiraled. They bind.

this is literally crazy expensive i got my textbook binded from fedex for $1.08 YES! i already had holes in my book so if you don't they will do that all for 5:50 this spiral coil is wayyyyyyy to expensive

These coils are perfect.

A few years ago, I splurged and purchased a coil binding machine, and I got probably three sizes of (fairly small to medium-sized) coils to go with it. I went a little crazy, printing up all kinds of things and binding them. I eventually got a larger box of the coils (around 20mm) but found myself at least occasionally needing to split things up because that wasn't quite big enough.These coils are fabulous. I haven't tried 220 sheets in it, as I don't have anything quite that big right now. But I also don't like pushing it quite that close to the stated limits. Almost everything I bind, I put cardstock covers onto, front and back, so the most I'd want to do with these coils is maybe 210 sheets.I mostly have used these for printing/binding workbooks for my kids (we homeschool), or doing up schedule books for me. We have quite a bit of curriculum where we get a huge pdf file that the kids need. We find it so much easier to work with when we print and spiral bind. The pages lay flat, you can leave it open to whichever page, writing is easy. And now, I don't have to do crazy stuff like split a workbook in half.These are floppier than the smaller sizes if you are just playing with the coils themselves, but they go into the punched pages just as readily, and once there an appropriate amount of pages in the coil, they feel sturdy and solid.I do have a crimping pliers, and that does a great job of bending the edges, so the pages stay put.So thrilled with these!

These have a little bit of shine to them but are basically a matte finish compared to other coils we have. And they're more of a charcoal grey compared to the others we have, which are black. My wife noticed both of these things before I did; I don't think the difference is that noticeable but she'd prefer them to be shiny black.These feel so floppy when you take one out of the box, I wondered how it was going to create any kind of a stable book, but once you have the paper in them they are great.The length works great for 11" paper and trimming and crimping where you want.My wife is very happy with the quality, and glad to have something now to use with the larger projects she wants to print out for both herself and the kids.We used to use comb binding but like the spirals much better for being able to manipulate the pages: you can open the book on a table and have the pages lay flat, or fold the front pages all the way behind the back pages so you can set a book on your lap for easy note taking.They work perfectly with the binder we got a few years ago; we're very happy with these spiral coils.