Non Mortise Door Hinges: Compared with the traditional hinge, the door and door frame do not need slotting and using screwdriver to screw the hinge on the door directly to avoid damage to the door and door frame, saving installation time.Quiet and Smooth Door Hinges: The non mortise door hinges are equipped with high quality bearings,which is capable of rotating 360and difficult to get stuck or stagnate, ensuring completely silent operation.Heavy Duty Door Hinges: 4inch x 3inch, rounded corners,3mm thickness - We are tougher as the most others offer 2.5mm thickness only.We recommend you to apply minimum 3 hinges for each interior door and minimum 4 hinges for heavy duty doors/gate.Stainless Steel Door Hinges: These door hinges are made of thicker high-quality stainless steel,elegant rounded corner design,heavy-duty and rust-resistant,our door hinges offers exceptional strength and durability.Package Inclusion: You will get a box of 6 door hinges comes with screws which have the same color as the hinge.These hinges can be installed on wooden doors, painted doors, aluminum alloy doors, cabinets, wooden boxes and other indoor and outdoor areas.24 Hours Customer Service & 30 Days Money Back Guarantee: Email us now if you have any difficulty with this product or are disappointed with this purchase, for example, defective item is received. We will react within 24 hours.higcab.