At the root of this question are physical reasons of why each fine-wire staple works well for a given application. The answer lies in having some familiarity of the unique shape and size of the wire that is used to make each staple.
Staples are formed from raw wire. It’s helpful to think of wire as being either fine (round) or flat (ribbon-like). The category of SENCO fine-wire staples includes both kinds.
Most people have stapled paper using the office-type stapler. The office paper stapler utilizes a fine-wire staple, it’s formed from a round type of wire, the thin profile of the wire does a fine job of piercing through sheets of paper, the wire is flexible enough to bend against the anvil plate of the stapler, and it nicely folds back against the back page of your documents.
You might also be familiar with flat-wire staples. If you have ever used the hand-squeeze type of stapling tools, which are great tools for installing paper against wood, and other jobs where a fine-wire staple might tear through the materials you are stapling, then you have seen flat-wire staples. A flat-wire staple measures thin north-to-south (thickness), and measures wide east-to-west (wih3h).
Upholstering is one of the most popular applications for SENCO fine-wire staples. If you consider the possible choices materials that might be used in upholstering a chair, you want to use a staple that does the best possible job in securing your material to the chair. You don’t want your staple to tear through the material, or promote a tearing after the staple is in place.
Most cloth-like upholstery fabrics are installed using the C or B wire staples because the round wire will drive fully to the work surface, it holds the fabric snugly, and it prevents cutting the threads of the fabric. The B and C series staples are also lower-cost when compared to the flat-wire choices, the finer the wire, the lower the cost.
On the other hand, let’s say you want to install a vinyl chair covering. Vinyl is more often installed with the flat-wire staples like the F or G. The flat staples have a hit-and-stop action by nature of the flatness of the wire. The flat-wire staples will resist tearing when the staple crown hits the vinyl surface. Since vinyl offers a greater lateral pull than cloth, the heavier wire flat staples better holding strength than a fine staple.
The primary point – be familiar with the wire size, crown size, and leg length before you order the fine-wire stapler for your application. Hopefully the information presented here will provide you with the ability to make the correct choice.