Conversion table GG size, use this drill, oval to this

Example. Measured with Grip-Guide hole siza 29/32. It will be drilled 29/32 and oval to 31/32. The example is in bold below.

GG size	Use this drill	Oval to
1/2	1/2	9/16
33/64	33/64	37/64
17/32	17/32	19/32
35/64	35/64	39/64
9/16	9/16	5/8
37/64	37/64	41/64
19/32	19/32	21/32
39/64	39/64	43/64
5/8	5/8	11/16
41/64	41/64	45/64
21/32	21/32	23/32
43/64	43/64	47/64
11/16	11/16	47/64
45/64	45/64	49/64
23/32	23/32	25/32
47/64	47/64	51/64
3/4	3/4	13/16
49/64	49/64	53/64
25/32	25/32	27/32
51/64	51/64	55/64
13/16	13/16	7/8
53/64	53/64	57/64
27/32	27/32	29/32
55/64	55/64	59/64
7/8	7/8	15/16
57/64	57/64	61/64
29/32	29/32	31/32
59/64	59/64	63/64
15/16	15/16	1
61/64	61/64	1 1/64
31/32	31/32	1 1/32
63/64	63/64	1 3/64
1	1	1 1/16
1 1/32	1 1/32	1 3/32
1 1/16	1 1/16	1 1/8