Looking for discreet, secure locking solutions? These stainless steel tubewell mortise locks install completely hidden within your door frame for a clean, minimalist look while providing reliable security. You get two complete locksets in the package, each including the lock mechanism, keys, and all necessary installation screws and spacers. The locks measure 63.3 x 45.8 x 21.5mm and fit door thicknesses between 35-45mm, making them perfect for fire doors, office doors, shop entrances, homes, and even drawers or cabinets where you want hidden security. The stainless steel construction resists rust and corrosion, ensuring long-lasting performance. Installation is straightforward with the included hardware, though you'll need to cut precise mortises in your door frame for the hidden installation. The keys are a good size at 54mm length, providing a comfortable grip while remaining compact. These locks offer a more discreet alternative to traditional visible locksets while maintaining good security for interior doors, storage areas, or secondary entrances. The brushed silver finish looks professional and blends well with most door materials and finishes. Having two locks means you can secure multiple doors with matching hardware, or keep one as a spare. The mechanism feels smooth and reliable, and the keys turn cleanly without excessive force. Whether you're securing office filing cabinets, storage rooms, or want a cleaner look on your interior doors, these hidden mortise locks deliver security without the visual clutter of traditional locks. They're particularly popular for modern office designs, retail spaces, and homes where aesthetics matter as much as functionality.