Manufacturer: Big Gator Tools. The V-Drill guide prevents drill bits from. V-Groove aligns drill. V-Drill guide automatically aligns drill bit to work surface for precision. Includes 9 standard drill sizes: 3/8", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64", 1/2".
