Review (4/5): Solid construction,  very coarse, full head of filing.
This works well in the shower which was what I needed it for. The handle is very solid, you can tell it won't break easily even with good pressure. It also has 360 degrees of grit around the filing area which is what I was after. The grit feels about an 80 so it's also the coarseness I wanted (very coarse). The only reason I gave 4 instead of 5 is because I wanted something thinner so I could slide easily between my toes. This is a little too thick for that but it still works.