Drills

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Size

Imperial

Decimal

Metric
Approx

MT

17/32

.531

13.49

1

35/64

.546

13.89

1

9/16

.562

14.28

2

37/64

.578

14.68

2

39/64

.609

15.47

2

5/8

.625

15.87

2

41/64

.640

16.27

2

43/64

.671

17.06

2

11/16

.687

17.46

2

45/64

.703

17.85

2

23/32

.718

18.25

2

47/64

.734

18.65

2

49/64

.756

19.44

2

25/32

.781

19.84

2

13/16

.812

20.63

2

7/8

.875r

22.22

2

25mm

.984

25

3

1

1.000

25.4

3

forstner bits

15, 20, 25, 30, 35, 38