Kurumi Arms (クルミアームズ Kurumi Āmuzu, lit. "Walnut Arms") is an alternate default walnut-based armored Medieval Squire form of Armored Riders. Accessed through the Kurumi Lockseed, this form bears the Knuck Met (ナックメット Nakku Metto) helmet with the Knuck Eye (ナックアイ Nakku Ai) visor. While it is the default form of Armored Rider Knuckle, it can also be used by other Riders.