Requiring power tools, hammers and wood chisel's installing a deadbolt on an Un-Prepped door can be a daunting task for the average home owner. We've installed hundreds and have all the tools and know-how to get this job done right the very first time. The work will be completed quickly and we'll clean up when we are done.  We don't recoomend installing multiple deadbolts on a single door for the goal of added security, for that your far better off reinforcing the strike and jamb. See our guide here : Strikes & Kick in protection. Call us today for service: 210-929-2495