LOCKING PRIVACY: Use on doors requiring privacy, can be locked inside with a push button and unlocked outside with provided release tool, recommended for bedrooms and bathrooms. NEVER SAG LEVER: Our exclusive design utilizes dual compression springs to keep the lever straight and wobble-free over the lifetime of the handle without the risk of sagging. Do it yourself, installs in minutes with just a screwdriver. Reversible handle for left- or right-handed doors, detailed directions provided. Fits standard size doors 1-3/8" to 1-3/4" thick, adjustable latch backset from 2-3/8" to 2-3/4" with just a twist during installation.