Keyless Lock (Electronic Keypad Lock), install it yourself! Don't worry about losing, forgetting, or making extra keys time and time again! Install this Keyless Door Lock yourself -- with nothing more than a screwdriver. Fits in standard door knob installation hole -- Adjustable latch backset 2 3/8 to 2 3/4 . You're free to add, change, or delete user codes -- and come and go as you please. This lock works for exterior, interior, side, or garage entry doors. For family, each member can have their own user code to access. Coming home late at night? No problem!
!!! Caution !!! the most common error in installation: four batteries are NOT placed correctly. Please check the +/- poles for ALL FOUR batteries according to the battery-box markings. BEFORE installations, please read FAQ.   
 Feature
    Easy setup: master code, passage code, plus up to 8 user codes - all controlled by your master code
    Fits both left and right-hinged doors; heavy duty design (stainless steel) and all-weather, for both outdoor and indoor applications
    Design for Do It Yourself (DIY) and Easily replace most existing door locks
    Auto-lock from outside in three seconds after entry to ensure max. security
    Low battery warning, plus backup battery box jumper
Electronic Number Lock Encryption
This function is an added security feature which is aimed at preventing codes being observed while being entered.
Step 1.Enter the first digit of the code you want to enter.
Step 2.Enter any sequence of the digits to confuse the observer.
Step 3.Enter the balance of the user code, followed by the ¡°#¡± key.

• Item Weight 2.6 pounds /Product Dimensions 6.5 x 4.5 x 3 inches
• Item model number OS99 / Batteries: 4 AAA batteries required.
• Size Adjustable latch backset 2 3/8" to 2 3/4"
• Color Satin Nickel / Item Package Quantity 1
• Batteries Included? No / Batteries Required? Yes

Item Weight 2.6 pounds /Product Dimensions 6.5 x 4.5 x 3 inchesOSPON