Solid Cold-rolled Steel Material: The door hinges are made of cold-rolled steel plate material with high hardness and double-layer plating treatment, it has better anti-rust performance. Not easy to deform and has a long service life. 90 Degree Soft Close Hinge: The opening angle of the door hinge is 90 degrees. Easy to adjustment for doors.This mute door hinge needs to be opened for at least 60 degrees in order to achieve a Soft Slow Close function. Door Closed Slowly & Mute Funtion:The special mechanism slowly pulls the door to obtain silent and fluid movements.Cupboard door hinges with invisible spring hinge, the noise is small, and the door is slowly opened and close.When the door closes, there will be no ""bang"" to frighten the child. There will be no harsh rubbing sound when opening and closing." Easy to Install without Drilling: 10 kitchen door hinges come with 80pcs screws, you no longer need to buy extra screws. To meet your installation needs. No drilling required, kitchen hinges soft close with punch-free design, Easy installation, you don't have to cut or drill out any housing as other hinges.Complete the installation with a screwdriver. Widely Usage: Our hinges are very ideal for use on kitchen cabinet doors, wardrobe doors, bookcases, wine and other luxury door connection. It can be used to adjust the alignment of the doors. This hinge can be mounted on the door in a variety of ways, Fully Covered/Partially Covered/Embedded.