This black metal chair hardware is built as a butterfly-style chair base plate with a square-like four-corner mounting layout, a central circular hub, and an attached lift/rotation handle. Designed as an office chair base plate, it provides a stable replacement or repair part for chairs that use a central hub and four-point mounting structure. As a swivel base plate, it supports smooth seat rotation while the reinforced ribs around the center help maintain a firm, steady connection. The butterfly chair base plate includes four corner mounting holes, making it straightforward to align with matching chair hardware and secure in place. This chair base plate helps restore the base connection and rotation function of a chair, making it useful when replacing a worn or damaged lower seat mechanism.
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