Grove’s flagship all-terrain crane is a beast. The GMK7550 is a seven-axle crane that has a 550 ton maximum capacity. Standard TWIN-LOCK boom length is 230 feet, which can stretch to 430 feet with extensions and attachments. It is also outfitted with an impressive array of features, including a stowing crane cab (which swings hydraulically to the right for operation), an optional eighth axle, and a state-of-the-art control console with EKS5 and Electronic Crane Operating System (ECOS), combined with a dual-screen display.