The Big Gator Tools Standard V-TapGuide is designed to help users accurately guide hand tapped threads on the inside of a whole to accept a machine screw or bolt. The tap guide can also be used to restore an internal thread that has been damaged or to cut a new, larger thread in the case of severe damage or stripping. The tap guide holes are sized for ANSI Standard ground hand taps. The Standard V-TapGuide has nine holes that can accommodate 32 different standard ground tap sizes. All V-TapGuides carry a lifetime warranty and are USA made.