General description The Stainless Steel Mechanical Door Lock with Keypads offers a secure and convenient keyless entry solution for various types of doors. Its adjustable unlocking direction makes it compatible with both left-handed and right-handed doors, while its robust design ensures high anti-theft performance. Technical specifications Material: Stainless Steel Suitable door thickness: 35-65mm Combination code: 4-6 digits (numbers or alphabets, no repetitions) Diameter of installed hole: approximately 1 cm Compatibility and accessories Compatible with interior and exterior wooden doors Suitable for aluminum alloy doors Works with wrought iron doors Accessories can be shortened based on actual door thickness Installation Two installation methods: surface mount (no need to insert the lock into the door) and mortise Comes with detailed installation instructions Installation is simple and quick Usage No need for batteries or charging Easy to set and change codes Granular buttons