Butter Knife" - The Hand-Sized LEGO Weapon - Lego Creations - The TTV Message Boards
How to Build the Lego Technic Folding Knife (MOC - 4K) | Flickr
Lego Moc] Technic Sword - YouTube
Lego Technic: Farm: Combine Harvester + Dragster version from 8274 see descr | eBay
LEGO Technic Motorcycle, 42132 - Lego & Construction
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Adorably functional LEGO Swiss-army multitool actually has implements that you could use! - Yanko Design