The Decatur Pipe Knife is a repurposed tool. It started out as a bevel knife, which is used to round the edges of a hole. I used one every day when I was drilling bowling balls to take the sharp edge off the holes. When I saw the Savinelli Fits-All, it just looked like a shorter bevel knife with a briar handle. When we started to put together the Decatur Pipe Shield line, we found a company to make bevel knives, but with the sharp point ground off so it wouldn't gouge the bowl. I like the longer blade and more substantial handle. It's the only reamer I use because it works on conical and oval chambers, too.
Russ