step by step how to drill hole for new door knob
https://youtu.be/MdXyOCU8wOU
Tools needed for this job
1- electric drill
1- Philips head screwdriver
1- 1/2 inch chisel
1- 2 1/8 inch hole saw
1- 1 inch hole saw
1- 3 3/2 drill bit
1- square
1- pencil or pen