Shimomura Alec (職人堅気) Shineblade Fina Stainless Steel File (K236)

This stainless steel file is intended for filing plastic or resin parts and double-sided, features U-shaped grooves, and is rust-resistant. It's especially useful for shallow or otherwise slight adjustments, so you don't have to worry about filing too much in one stroke. Its front file is a fine #1000, with file on the back a bigger, but still smooth, #600.