Valtitan Three Square Hand File Great For Metalsmiths, Metal Working & Filing. This is a new Valtitan #2 cut three square hand file. This can be used for filing corners, holes and edges. Great for platinum, stainless steel, hard plastics or anything else that is hard. Has better performance on hard to file surfaces. This file has a Rockwell hardness of 72 HRC. Has little or no clogging, a light knock is enough to loosen any clogging. Highly resistant to corrosion. Made in Switzerland. It measures approximately 10 5/8" x 9/16" (270 x 14 mm).