Using our DIY Drill Guide, with the bubble level attached, is the most accurate to install your DIY Pool Fence and Gates. It allows you to consistently drill the holes at the proper angle. It takes all of the guessing out of the drilling process. Please note a 5/8″ X 14″ (or longer) concrete drill bit will be required to use this Drill Guide. Please refer to the Installation Guide for the proper use of this tool.