High quality: The table hinge uses a high quality zinc alloy, which is smooth and abrasion resistant and has a high hardness.Round Edge: Fits perfectly in your folding table and the holes are lined up.Better handling feel: no opening of the hole, easy installation and long life over 50,000 times required.Great helper: Very high quality mechanism that pulls the table surface slowly and closes for a quiet, quiet movement.Wide Applications: Suitable for many surfaces such as computer desk, sewing machine, windows, doors and folding table etc.This item slowly pulls the table surface and closes for a gentle and quiet movement. It is designed for sewing machine, folding table and other furniture. No hole opening, easy installation and long life over 50000 times. You can be sure it is made of a high hardness zinc alloy, durable to use.Properties:High quality zinc alloy, surface smooth, abrasion resistant, high hardness. No hole opening, easy installation and long life over 50000 times. Round edge, fits perfectly in your folding table and the holes are lined up. Very high-quality mechanism that slowly pulls the table surface and closes for a gentle and quiet movement. Suitable for many surfaces such as computer desk, sewing machine, windows, doors and folding table etc.Specification:Material: Zinc alloy.Color: silverLifetime:> 50000 timesPackaging includes:4 x hingesDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!