Aluminum drain pan thread repair kit includes all the tools with tap guide and 5 inserts 12.7mm p/n 16153 (note: this kit includes 1 drain plug. Note on Drill  This is just an option where you have no clearance to use a drill motor. The drilling is more difficult by hand but the drill will slowly cut out the old threads. Don't worry if there is a little wobble when drilling at first as the second tool counterbore will remove this.