A mower deck is the part of a lawn mower that houses the cutting blades. It is typically made of metal and is designed to protect the blades while allowing grass to be cut efficiently. The mower deck's height can often be adjusted to achieve different grass lengths, making it versatile for various lawn types. Mower decks come in different sizes and shapes, depending on the type of mower, such as push mowers or riding mowers. The design of the deck affects how well the mower can handle uneven terrain and how evenly it cuts the grass. Regular maintenance of the mower deck is essential for optimal performance.