Inch

1 1/8"

1 1/4"

1 3/8"

1 1/2"

1 3/4"

2"

2 1/4"

2 1/2"

2 3/4"

3"

3 1/2"

4"

4 1/2"

5"

6"

1"

1 1/4"

1 1/2"

2"

1 1/4"

Carbide

Plastic

Steel

Wood

4

6

8

10

12

14

16

Aluminum Titanium Chromium Nitride (AlTiCrN) Coated

Aluminum Titanium Nitride (AlTiN) Coated

Black Oxide

Diamondlike Carbon (DLC) Coated

Nickel Plated

Titanium Aluminum Nitride (TiAlN) Coated

Titanium Carbon Nitride (TiCN) Coated

Titanium Diboride (TiB₂) Coated

Titanium Nitride (TiN) Coated

Uncoated

2

3

4

5

6

8

10

13

1"

1 1/8"

1 1/4"

1 3/8"

1 1/2"

1 9/16"

1 5/8"

1 23/32"

1 3/4"

1 7/8"

1 61/64"

1 31/32"

2"

2 1/4"

2 15/32"

Amana Tool

Keo

Kyocera

Mil-Tec

Republic Drill

2 3/32"

2 5/16"

2 1/2"

2 5/8"

2 27/32"

3"

3 9/32"

3 3/8"

5 3/4"

Insert

Insert Holder