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MX4™ 4-Cutter SDS MAX Rotary Hammer Drill Bits

Our MX4™ 4-Cutter SDS MAX Rotary Hammer Drill Bits with solid head carbide deliver up to 5x longer life in concrete with rebar. Engineered with rebar guards to provide maximum durability in hard aggregate and rebar. We designed our MX4™ 4-Cutter bits with sharp centering tips for exact spot drilling in concrete. The integrated 4-cutter design prevents lock-up in rebar, reducing downtime. Optimized flutes remove dust faster, reducing heat and delivering up to 15% more holes per battery charge. The wear mark indicator on each drill bit shows you when they no longer meet the ANSI requirement. These MILWAUKEE® MX4™ 4-Cutter Drill Bits are ideal for concrete with rebar and masonry applications.

MX4™ 4-Cutter SDS MAX Rotary Hammer Drill Bits

Features / SpecsRefine OptionsReviews
Solid head carbide delivers up to 5x longer life in concrete with rebar
Rebar guards for maximum durability in hard aggregate and rebar
Sharp centering tip for exact spot drilling in concrete and metal decking
4-cutter design prevents lock-up in rebar, reducing downtime
Optimized flutes remove dust faster reducing heat & delivering up to 15% more holes per battery charge
German Made
Meets ANSI B212.15 to fit common anchors
Wear Mark Indicators to show end of life and when bit no longer meets the ANSI requirement
Ideal for concrete with rebar and masonry
Fits all SDS-MAX rotary hammers

Product Specifications

Material Application
Concrete
Length
21 in
Weight
41.8 lb
Height
1.13 in
Width
1.13 in
 
 

Diameter

3/8"

1/2"

9/16"

5/8"

11/16"

3/4"

13/16"

7/8"

5/8"

3/4"

7/8"

1"

1-1/16"

1-1/8"

1-1/4"

1-3/8"

1-7/16"

1-1/2"

1-9/16"

1-5/8"

1-3/4"

2"

27/32"

Useable Length

10 in

12 in

12.0 in

16.0 in

17 in

17.0 in

18 in

18.0 in

24 in

24.0 in

31 in

31.0 in

54.0 in

8 in

8.0 in

Length

13 in

13.0 in

15 in

17 in

17.0 in

21 in

21.0 in

23 in

23.0 in

28.0 in

29 in

29.0 in

36 in

36.0 in

60.0 in

SKU
Diameter
Useable Length
Length
48-20-3901
3/8"
8.0 in
13.0 in
48-20-3902
1/2"
8.0 in
13.0 in
48-20-3903
1/2"
12.0 in
17.0 in
48-20-3904
1/2"
16.0 in
21.0 in
48-20-3905
1/2"
24.0 in
28.0 in
48-20-3906
1/2"
31.0 in
36.0 in
48-20-3909
1/2"
54.0 in
60.0 in
48-20-3910
9/16"
8.0 in
13.0 in
48-20-3912
9/16"
16.0 in
21.0 in
48-20-3916
5/8"
8.0 in
13.0 in
48-20-3917
5/8"
12.0 in
17.0 in
48-20-3918
5/8"
16.0 in
21.0 in
48-20-3922
5/8"
31.0 in
36.0 in
48-20-3923
5/8"
54.0 in
60.0 in
48-20-3926
11/16"
16.0 in
21.0 in
48-20-3930
3/4"
8.0 in
13.0 in
48-20-3931
3/4"
12.0 in
17.0 in
48-20-3932
3/4"
16.0 in
21.0 in
48-20-3936
3/4"
31.0 in
36.0 in
48-20-3938
13/16"
17 in
21 in
48-20-3942
27/32"
17.0 in
21.0 in
48-20-3944
7/8"
8 in
13 in
48-20-3945
7/8"
12 in
17 in
48-20-3946
7/8"
17 in
21 in
48-20-3949
7/8"
31 in
36 in
48-20-3952
1"
8 in
13 in
48-20-3953
1"
12 in
17 in
48-20-3954
1"
17 in
21 in
48-20-3956
1"
31 in
36 in
48-20-3958
1-1/16"
18 in
23 in
48-20-3964
1-1/8"
12 in
17 in
48-20-3966
1-1/8"
17 in
21 in
48-20-3967
1-1/8"
31 in
36 in
48-20-3970
1-1/4"
10 in
15 in
48-20-3972
1-1/4"
18 in
23 in
48-20-3974
1-1/4"
31 in
36 in
48-20-3975
1-3/8"
12.0 in
17.0 in
48-20-3980
1-3/8"
18.0 in
23.0 in
48-20-3983
1-3/8"
31.0 in
36.0 in
48-20-3984
1-7/16"
18.0 in
23.0 in
48-20-3986
1-1/2"
12.0 in
17.0 in
48-20-3988
1-1/2"
18.0 in
23.0 in
48-20-3990
1-9/16"
18.0 in
23.0 in
48-20-3991
1-5/8"
18.0 in
23.0 in
48-20-3992
1-3/4"
18.0 in
23.0 in
48-20-3993
2"
18.0 in
23.0 in
48-20-3920
5/8"
24.0 in
29.0 in
48-20-3934
3/4"
24.0 in
29.0 in
48-20-3947
7/8"
24.0 in
29.0 in
48-20-3955
1"
24 in
29 in
48-20-3965
1-1/8"
8 in
13 in
48-20-3969
1-1/8"
24 in
29 in
48-20-3973
1-1/4"
24 in
29 in
48-20-3981
1-3/8"
24 in
29.0 in
48-20-3985
1-1/2"
24.0 in
29.0 in
48-20-3987
1-1/2"
31.0 in
29.0 in