Big Gator Tools SDGMINI MINI V-Drill Guide 21 Drill Sizes 21 Drill Sizes: #10, 21, 25, 29, 30, 1/8, 33, 7/64, 36, 37, 38, 40, 3/32, 43, 45, 47, 5/64, 50, 1/16, 53, 3/64". Covers all tap drill sizes for tap sizes: 10-32 down to 0-80. The portable V-Drill Guide ensures straight and accurate hand drilled holes on flat surfaces, corners and round parts! Heat treated for durability. Side alignment marks allow accurate hole locating. 100% Made in U.S.A.