If you're checking out the Professional Heavy Duty Hog Ring Pliers, here's the scoop on what comes with them: according to the manufacturer's description, you'll get 3/8 inch stainless steel hog rings in the package.

But, here's an important note: the pliers themselves are made from alloy steel, not stainless steel. This detail matters if you're thinking about how resistant they'll be to rust and general wear.

Based on what we've found, while the hog rings are described as stainless, the pliers' alloy steel construction might not be as rust-resistant. Some feedback suggests that these pliers can be magnetically attracted, which usually points to non-stainless parts that could rust, especially if you're working in damp or wet environments.

It seems there's a bit of concern out there about the potential for rust. One perspective was that even 'stainless' hog rings might start rusting if they're in contact with saltwater or moisture for too long. Plus, while the pliers are marketed as rugged and of high quality, they're not explicitly labeled as stainless steel.

The key thing to remember is that 'stainless' mainly applies to the hog rings, not the pliers. So, if you're using them in places where they'll get wet a lot—think marine or high-moisture situations—you might want to use a corrosion inhibitor on the tool or look for something that's specifically rust-proof.

That said, folks have generally been happy with the pliers. They're praised for being sturdy and versatile, whether you're doing upholstery or building cages. They're reliable for a variety of projects, just bear in mind that you might need to take some extra steps to keep them rust-free if you’re working in particularly moist environments.