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AT HSS Countersinks

AT hole enlarging core drills are designed to enlarge or open up existing holes in metalworking and industrial applications (application dependent). Unlike standard twist drills that start from solid material, core drills are commonly used when a hole is already present and you need to bring it to a larger diameter with improved control and efficiency—often in fabrication, maintenance, and repair work.

Alfa Tools CSF18009 1-1/4 X 1/2 HSS 100° SINGLE FLUTE USA COUNTERSINK

Alfa Tools CSF18009 1-1/4 X 1/2 HSS 100° SINGLE FLUTE USA COUNTERSINK

SKU: AT-CSF18009
MPN: CSF18009

Save $124.34
Alfa Tools CSF18010 1-1/2 X 3/4 HSS 100° SINGLE FLUTE USA COUNTERSINK

Alfa Tools CSF18010 1-1/2 X 3/4 HSS 100° SINGLE FLUTE USA COUNTERSINK

SKU: AT-CSF18010
MPN: CSF18010

Save $168.39
Alfa Tools CSF18011 1-3/4 X 3/4 HSS 100° SINGLE FLUTE USA COUNTERSINK

Alfa Tools CSF18011 1-3/4 X 3/4 HSS 100° SINGLE FLUTE USA COUNTERSINK

SKU: AT-CSF18011
MPN: CSF18011

Save $214.94
Alfa Tools CSF18012 2 X 3/4 HSS 100° SINGLE FLUTE USA COUNTERSINK

Alfa Tools CSF18012 2 X 3/4 HSS 100° SINGLE FLUTE USA COUNTERSINK

SKU: AT-CSF18012
MPN: CSF18012

Save $300.88
Alfa Tools CSF50521 3/16 X 3/16 HSS 82° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50521 3/16 X 3/16 HSS 82° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50521
MPN: CSF50521

Save $7.19
Alfa Tools CSF50521A 3/16 X 3/16 HSS 60° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50521A 3/16 X 3/16 HSS 60° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50521A
MPN: CSF50521A

Save $7.19
Alfa Tools CSF50521B 3/16 X 3/16 HSS 90° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50521B 3/16 X 3/16 HSS 90° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50521B
MPN: CSF50521B

Save $7.19
Alfa Tools CSF50521C 3/16 X 3/16 HSS 100° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50521C 3/16 X 3/16 HSS 100° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50521C
MPN: CSF50521C

Save $7.19
Alfa Tools CSF50521CD 3/16 X 3/16 HSS 82° SINGLE FLUTE COUNTERSINK CARDED

Alfa Tools CSF50521CD 3/16 X 3/16 HSS 82° SINGLE FLUTE COUNTERSINK CARDED

SKU: AT-CSF50521CD
MPN: CSF50521CD

Save $9.68
Alfa Tools CSF50522 1/4 X 1/4 HSS 82° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50522 1/4 X 1/4 HSS 82° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50522
MPN: CSF50522

Save $7.28
Alfa Tools CSF50522A 1/4 X 1/4 HSS 60° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50522A 1/4 X 1/4 HSS 60° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50522A
MPN: CSF50522A

Save $7.28
Alfa Tools CSF50522B 1/4 X 1/4 HSS 90° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50522B 1/4 X 1/4 HSS 90° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50522B
MPN: CSF50522B

Save $7.28
Alfa Tools CSF50522C 1/4 X 1/4 HSS 100° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50522C 1/4 X 1/4 HSS 100° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50522C
MPN: CSF50522C

Save $7.28
Alfa Tools CSF50522CD 1/4 X 1/4 HSS 82° SINGLE FLUTE COUNTERSINK CARDED

Alfa Tools CSF50522CD 1/4 X 1/4 HSS 82° SINGLE FLUTE COUNTERSINK CARDED

SKU: AT-CSF50522CD
MPN: CSF50522CD

Save $9.78
Alfa Tools CSF50523 5/16 X 1/4 HSS 82° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50523 5/16 X 1/4 HSS 82° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50523
MPN: CSF50523

Save $8.51
Alfa Tools CSF50523A 5/16 X 1/4 HSS 60° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50523A 5/16 X 1/4 HSS 60° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50523A
MPN: CSF50523A

Save $8.51
Alfa Tools CSF50523B 5/16 X 1/4 HSS 90° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50523B 5/16 X 1/4 HSS 90° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50523B
MPN: CSF50523B

Save $8.51
Alfa Tools CSF50523C 5/16 X 1/4 HSS 100° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50523C 5/16 X 1/4 HSS 100° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50523C
MPN: CSF50523C

Save $8.51
Alfa Tools CSF50523CD 5/16 X 1/4 HSS 82° SINGLE FLUTE COUNTERSINK CARDED

Alfa Tools CSF50523CD 5/16 X 1/4 HSS 82° SINGLE FLUTE COUNTERSINK CARDED

SKU: AT-CSF50523CD
MPN: CSF50523CD

Save $11
Alfa Tools CSF50524 3/8 X 1/4 HSS 82° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50524 3/8 X 1/4 HSS 82° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50524
MPN: CSF50524

Save $10.16
Alfa Tools CSF50524A 3/8 X 1/4 HSS 60° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50524A 3/8 X 1/4 HSS 60° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50524A
MPN: CSF50524A

Save $10.16
Alfa Tools CSF50524B 3/8 X 1/4 HSS 90° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50524B 3/8 X 1/4 HSS 90° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50524B
MPN: CSF50524B

Save $10.16
Alfa Tools CSF50524C 3/8 X 1/4 HSS 100° SINGLE FLUTE COUNTERSINK

Alfa Tools CSF50524C 3/8 X 1/4 HSS 100° SINGLE FLUTE COUNTERSINK

SKU: AT-CSF50524C
MPN: CSF50524C

Save $10.16
Alfa Tools CSF50524CD 3/8 X 1/4 HSS 82° SINGLE FLUTE COUNTERSINK CARDED

Alfa Tools CSF50524CD 3/8 X 1/4 HSS 82° SINGLE FLUTE COUNTERSINK CARDED

SKU: AT-CSF50524CD
MPN: CSF50524CD

Save $12.66