I sell all kinds of magnifiers, most common are any type of clip on. Personally I still prefer “glasses”. 3.0 used to be just right, then my eyes longed for something just a tad stronger and I found spert.com. They have a nice selection of styles and are well priced around $20.00. But more importantly they have readers up to 6.00. I love my 4.00’s and hope I’ll never need anything stronger than a 6 while I can still hold a needle. Mine came with hard cases and arrived quickly. Speert High Power Reading Glasses.