Door Lock,Blacksmith Electronic Door Lock with Knob Handle,Keypad Smart Door Lock for Home,Black 

this lock mechanism is super easy to install. if you lose your keys or forget them somewhere you'll never lock yourself out of the house. the hardest part about the installation is reading the small print instructions on how to program it..

I like it open and close it does pay to actually read the instructions. I messed up and got it locked up in something and had to go buy a tiny screwdriver to get it unlocked so definitely read the instructions and pay attention on the bar. There's a little notch that goes up and down. It goes to the outside where the keypad is not on the inside where the battery pack is and if you read the instructions, it's easy to set up. I like the design if you do it right, you'll see a blue light. If you do it wrong you'll see a red light and when you're programming it, you'll see a green light and I definitely plan on buying two more one for each of my other doors.