This item slowly pulls the table surface and close for a smooth silent motion. It is designed for sewing machine, folding table and other furniture. No need to open hole, easy installation and long service life over 50000 times. You can rest assured to buy it as it is constructed from high hardness zinc alloy, durable to use. Features: Adopting high quality zinc alloy, surface smooth, abrasion resistant, high hardness. No need to open hole, easy installation and long service life over 50000 times. Round edge, fits perfectly into your folding table and the holes are lined up.; Very high quality mechanism which slowly pulls the table surface and close for a smooth silent motion. Suitable for many surfaces like computer desk, sewing machine, windows, doors and folding table etc. Specification: Condition: 100% Brand New Material: Zinc Alloy Color: Gold Lifespan: >50000 times Product Size: Approx. 8 x 3cm / 3.1 * 1.2inch Package Weight: Approx. 36g~38g Package Included: 2 x Tray Hinge 1 Pack Screw Bag