20 Needle Files Great for Metalsmiths, Metal Working & Filing. This is a new set of 20 assorted needle files. These are great for filing wood, gold, silver, platinum, plastic and other hard to file materials. Better performance on hard to file surfaces. Little or no clogging, a simple knock is enough to remove the chips. These are highly resistant to corrosion and have a longer life than standard files. Each measures approximately 5 3/8" (136.5 mm) We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.