Product overview 4 pieces of folding table chain flip hinges made from zinc and zinc alloy, designed for sewing machine table tops and other dropleaf or folddown furniture. Each hinge provides reliable folddown action and stable support when the table is in use. Key benefits Stable support when open: Keeps a sewing machine table or work surface secure during use, reducing wobble and movement. Smooth folding action: Precision construction enables controlled opening and closing so the folds down neatly when not in use. Durable construction: Zinc and zinc alloy components resist everyday wear and deliver consistent performance for frequent folding cycles. Simple retrofit and replacement: Designed for straightforward mounting to existing table tops and frames using standard fasteners. Pack of four: Enough hinges to service multiple tables or to all fasteners on a single folding table setup. Main features and attributes Function: Folding chain flip hinge that supports and controls the movement of a table , allowing it to lock in the open position and fold flat when closed. Compatibility: Intended for sewing machine table tops and similar dropleaf or folddown furniture. Works with common furniture frames and mounting patterns that accept small folding hinges. Material: Zinc and zinc alloy components for strength and wear resistance. Performance: Smooth, controlled motion for repeated open and close cycles. Designed to provide stable support under typical sewing and crafting loads. Quantity: Four pieces included. Installation and maintenance Mounting: Fasten hinge plates to the table and support bracket using appropriate screws for your tabletop material. Check alignment before final tightening. Maintenance: Periodic inspection and light lubrication of the pivot points will keep motion smooth and extend service life. Practical use scenarios Sewing room: Install on a sewing machine table to allow the machine surface to fold down when not in use, freeing up workspace or storage space. Craft or hobby table: Use on a small workbench or craft table to create a temporary work surface that folds away easily for storage. Compact living areas: Fit on a dropleaf dining or side table in a small apartment to expand surface area when needed and fold flat when not in use. What to expect in the box Four folding table chain flip hinges made of zinc and zinc alloy, ready for installation. Screws and mounting hardware are not included and should be selected to match your tabletop material and thickness. Why choose these hinges These hinges provide a practical and durable solution for creating or restoring a folddown table . Their zinc alloy construction and folding chain design deliver controlled motion and reliable support for sewing machines and other lightweight to medium duty tabletop applications.