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Special Drills

Ask about Special Drill Manufacturing!

Ask your local Woodworking, Hardware, or Tool store about our Tools and our Guarantee!!!

Family Owned and Operated since 1945.
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These Step Drills are designed to predrill clearance holes through the first piece of wood and pilot holes for the threads in the second piece of wood. Sizes and lengths match standard screw sizes. Countersinks can be used to complete a 3-step operation in 1 step. Made of top quality High Speed Steel. 
SD1216

 

A

B

C

D

E

 Tool Number

 Screw Size

Wood Screw Length

Production Screw Depth **

Drill Dia ***

 Pilot Dia

Pilot Length

Twist Length

Overall Length

SD0404

#4

1/2

5/16

7/64

.075

5/16

1-1/2

2-5/8

SD0406

 

3/4

1/2

 

 

1/2

 

 

SD0408

 

1

5/8

 

 

5/8*

2-1/2

3-3/4

SD0410

 

1-1/4

13/16

 

 

13/16*

 

 

SD0604

#6

1/2

5/16

9/64

.094

5/16

1-3/4

2-7/8

SD0606

 

3/4

1/2

 

 

1/2

 

 

SD0608

 

1

5/8

 

 

5/8

 

 

SD0610

 

1-1/4

13/16

 

 

13/16*

3

4

SD0612

 

1-1/2

1

 

 

1*

 

 

SD0616

 

2

1-5/16

 

 

1-5/16*

 

 

SD0804

#8

1/2

5/16

11/64

.112

5/16

2-1/8

3-1/4

SD0806

 

3/4

1/2

 

 

1/2

 

 

SD0808

 

1

5/8

 

 

5/8

 

 

SD0810

 

1-1/4

13/16

 

 

13/16

 

 

SD0812

 

1-1/2

1

 

 

1

3-3/8

4-1/2

SD0816

 

2

1-5/16

 

 

1-5/16*

 

 

SD0820

 

2-1/2

1-5/8

 

 

1-5/8*

 

 

SD0824

 

3

2

 

 

2*

6

8

SD1006

#10

3/4

1/2

13/64

.130

1/2

2-7/16

3-5/8

SD1008

 

1

5/8

 

 

5/8

 

 

SD1010

 

1-1/4

13/16

 

 

13/16

 

 

SD1012

 

1-1/2

1

 

 

1

 

 

SD1016

 

2

1-5/16

 

 

1-5/16*

3-5/8

4-1/2

SD1020

 

2-1/2

1-5/8

 

 

1-5/8*

 

 

SD1024

 

3

2

 

 

2*

6

8

SD1208

#12

1

5/8

7/32

.148

5/8

2-1/2

3-3/4

SD1210

 

1-1/4

13/16

 

 

13/16

 

 

SD1212

 

1-1/2

1

 

 

1

 

 

SD1216

 

2

1-5/16

 

 

1-5/16

3-5/8

5

SD1220

 

2-1/2

1-5/8

 

 

1-5/8*

 

 

SD1224

 

3

2

 

 

2*

6

8

SD1228

 

3-1/2

2-5/16

 

 

2-5/16*

 

 

SD1408

#14

1

5/8

1/4

.165

5/8

2-3/4

4

SD1410

 

1-1/4

13/16

 

 

13/16

 

 

SD1412

 

1-1/2

1

 

 

1

 

 

SD1416

 

2

1-5/16

 

 

1-5/16

 

 

SD1420

 

2-1/2

1-5/8

 

 

1-5/8*

3-3/4

5

SD1424

 

3

2

 

 

2*

 

 

SD1428

 

3-1/2

2-5/16

 

 

2-5/16*

6

8

SD1432

 

4

2-5/8

 

 

2-5/8*

 

 

SD1610

#16

1-1/4

 

17/64

.184

13/16

2-7/8

4-1/8

SD1612

 

1-1/2

 

 

 

1

 

 

SD1616

 

2

 

 

 

1-5/16

 

 

SD1620

 

2-1/2

 

 

 

1-5/8*

3-7/8

5-1/4

SD1624

 

3

 

 

 

2*

 

 

SD1628

 

3-1/2

 

 

 

2-5/16*

6

8

SD1632

 

4

 

 

 

2-5/8*

 

 

SD1816

#18

2

 

19/64

.204

1-5/16

3-1/16

4-3/8

SD1820

 

2-1/2

 

 

 

1-5/8

4

5-1/4

SD1824

 

3

 

 

 

2*

 

 

SD1828

 

3-1/2

 

 

 

2-5/16*

6

8

SD1832

 

4

 

 

 

2-5/8*

 

 

SD2012

#20

2-1/2

 

5/16

.223

1-5/8

4

5-1/4

SD2024

 

3

 

 

 

2

 

 

SD2028

 

3-1/2

 

 

 

2-5/16*

6

8

SD2032

 

4

 

 

 

2-5/8*

 

 

SD2424

#24

3

 

3/8

.260

2

4-1/4

5-1/2

SD2432

 

4

 

 

 

2-5/8

6

8

SD2436

 

4-1/2

 

 

 

3*

 

 

SD2448

 

6

 

 

 

4*

7-1/2

10

* Step Drills with extra long pilot lengths are not guaranteed against breakage.

** Production Screw Depth (for Production or Sheet Rock screws)

To find this dimension, subtract the thickness of the top piece of wood from the length of the screw.

*** All shank diameters (F) are the same size as the (A) drill diameter.
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[HSS Step Drills] [Wood Screw Step Drills]

For ordering or pricing, contact one of the Distributors in your area or order from one of our On-line Distributors.
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