Some Swiss Army knives feature locking blades to prevent accidental closure. Wenger was the first to offer a ″Pack Lock ″ for the main blade on several of their standard 85mm models. Several large Wenger and Victorinox models feature a locking blade secured by a slide lock that is operated with an unlocking-button integrated in the scales. Some Victorinox 111 mm series knives feature a double liner lock that secures the cutting blade and large slotted screwdriver/cap opener/wire stripper combination tool designed towards prying. [16] Design and materials Rivets and flanged bushings made from brass hold all machined steel parts and other tools, separators and the scales together. The rivets are made by cutting and pointing appropriately sized bars of solid brass. The separators between the tools ...