Amerdeco Brand Promise: We focus on quality and service, we are so confident in the quality of our products that you can try them for 120 days. If the door handle you received has any quality problems, contact us and we will replace it for free or give you a refund! 【Material Upgrade】:The accessories are newly upgraded to ensure that the handle will not sag or break after long-term use.The modern door handles are made of high-quality zinc alloy and brass components, which will not rust in high humidity environment. 【Privacy Function Without Keys】:The privacy door handles are interiored with a push button button (lock and unlock) and exteriored with emergency release hole. If baby is locked inside accidentally, the outside can unlock the door with a needle, no key needed. 【Easy Installation】:All you need is a door and a screwdriver and you can install it in minutes! No need for a professional door installer, you can do it yourself! 【Suitable Door Thickness】:Fit for most standard door thickness from 1-3/8 to 1-3/4 inch (35mm-45mm) and adjustable latch 2-3/8"or 2 3/4"(60mm or 70mm). Allow to replace your door Handles without rework on the door fram. Amerdeco 3 Pack Matte Black Door Handles Interior,Knurled Privacy Door Handles With Lock,Heavy Duty Black Door Lever for Bedroom or Bathroom,Reversible Keyless for Left Right Handed Doors AM0027