Umpqua Dream Stream Hook File

I'm doing more euro nymphing and dragging flies through the depths. Its increased my hookups for sure but I'm also dragging that fly, and therefore hook through gravel, sand, rocks and lumber periodically. Using this to get back to (or improve upon?) that factory sharpness in modern chemically sharpened hooks. Works well for a size 20 nymph or a 1/0 salmon hook.