From Halopedia, the Halo wiki
The upper section of a Steward is vast and wide, with two "arms". Three glowing eye-like lights are installed on the front of each Sentinel with two "claws" below it. The lower section is lined with four mechanical, tentacle-like "legs". Three glowing eye-like lights are installed on the front of each Sentinel.
The Stewards are fitted with a combination of support systems and offensive weaponry.
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