[304 Stainless Steel Material] This round recessed door lock is made of 304 stainless steel material, which is rustproof and not easy to fade after long-term use. It feels comfortable, enduring and has a long service life. [Hidden Door Lock] The handle can be turned inside and outside to close the door, and there is no reverse locking function. If installed on an invisible door that opens outward, a small latch can be installed inside. There are stand-up handle designs on both sides, and the rotatable handle can be hidden in the center of the door handle, simple and elegant. [Self-Tapping Screw Installation] Our hidden recessed cup door handle is installed with the self-tapping screws provided. It is mainly installed on doors with a thickness of 35-50mm. Please measure the specifications carefully before purchasing to ensure that it is suitable for the thickness of your door. Just turn the door pull and you can easily lock or open the invisible door without a key. [Widely Uses] This door handle is widely used for living rooms, bedrooms, study rooms, kitchens, bathrooms, balconies, passages and other places. [After-sales] If you have any questions, please get in touch with us, our service team will provide you with a professional and satisfactory service., Manufacturer: YUNYOUC