The tap guide holes are sized for ANSI Standard Ground Hand Taps. Standard V-TapGuide has 32 Standard Ground Tap Sizes (9 holes): 0-80, 1/64, 1-72, 2-56, 2-64, 3-48, 3-56, 4-36, 4-40, 4-48, 5-40, 5-44, 6-32, 6-36, 6-40, 8-32, 8-36, 8-40, 10-24, 10-32, 1/4-20, 1/4-28, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20, 5/8-11, 5/8-18". A V-TapGuide is a tap guide that answers the call to accurately guide hand-tapped threads on the inside of a hole to accept a machine screw or bolt. If every hole is started straight, it will help prevent tap breakage and increase the tap life. A V-TapGuide is a tap guide that answers the call to accurately guide hand tapped threads on the inside of a hole to accept a machine screw or bolt. If every hole is started straight, it will help prevent tap breakage and increase the tap life.

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