Classic American half ball ("HB") button shell is the upholstery
standard. Treated metal is highly resistant to rust and less likely to dent than aluminum versions. Good basic shell for many applications, including crafts, automotive and truck cab interiors, and general work.
If the edges of your finished buttons are "sharp" or appear to be collapsing, try aluminum
or consider Low Wall
Suitable for rust-resistant and nylon (plastic) button back materials. Fits standard American half ball button dies. #80 available by special order only.
Not compatible with Rowley button dies —follow link for more information.
Button backs sold separately.