What tools do I need to install the lock? (Sifely S) Jonathan November 26, 2022 21:38 Updated Question What tools do I need to install the lock? Answer The only tool that you will need is a Phillips head screwdriver. Related articles How do I install the lock? Should I leave the door open during installation? What are the compatible door dimensions? Checklist for parts to assemble and tools required (Sifely S Smart Lock) Why does my Sifely-S Smart Lock lock say “unlocked," but it still won’t open? Comments 0 comments Please sign in to leave a comment.