The latch and deadbolt are made from solid brass. The rest of the device is constructed from mild steel for enhanced durability and strength. The bolt through fixing holes means that this mortice lock is suitable for normal backplate door handles, mortice knobs and lever on rose door handles. Door lock designed for internal wooden doors where locking is needed,such as bedroom,bathroom,toilet doors and suitable for both left and right handed doors. The solid construction of the product protects against other threats such as burglary. Our lock increases substantially your home's security and gives you extra peace of mind. If you have any questions, please do not hesitate to contact us. We will have professional after-sales team to reply you within 24 hours.