bravex keyless entry keypad deadbolt door lock 304 stainless steel 100% mechanical - no risk of low power bravex <b>upgrade to a more convenient, more controllable keyless entry door lock.</b><br><br> <b>important ! please be careful before you place an order !</b><br> 1. the latch/ backset can adjust to 2-3/8" (to) 2-3/4”<br> 2.maximum applicable bore size 2-1/8 “. <br> 3.combination can be 4-8 digits(no repeat) and you can enter these numbers in any order to unlock it<br> 3.from inside. user can open the door anytime without enter the password.<br> 4.it will stay unlocked until the knob were turned to “lock” direction. that is perfect. once unlocked you can come and go as needed without having to re-enter the code.<br><br> <br> keyless deadbolt lock is a bump proof, pick proof, mechanical keyless door lock that does not require wires, batteries or electricity. this lock does have a knob on the outside as well as inside. the knob must be turned to “lock” direction to clear the input to receive the new input and lock the lock. they provide keyless security, are easy to install and use, fit most doors and are weather resistant. this lock can be used for exterior as well as interior doors.<br>