The X-small Super Lens Filter Wrench Set from Japan Hobby Tool consists of one wrench that is compatible with filter sizes ranging from 31 to 37mm and the other wrench is for sizes from 42 to 46mm, so you can remove a filter that is stuck on a lens; the wrenches also help to separate filters that have seized together. These rubberized steel wrenches avoid scratching a filter ring's finish when turning the tool counterclockwise to release the filter.