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AT Combined Drill & Countersinks

AT combined drill countersinks—often called drill countersink bits or combination drill & countersink tools—are designed to streamline hole preparation by drilling a pilot hole and creating a chamfer/countersink in one operation (application dependent). They’re commonly used in fabrication and maintenance work to help reduce tool changes and produce cleaner, more consistent hole edges for fasteners, rivets, and general deburring.

Alfa Tools CDK50475 ASA# 3X4 ALFA USA HSS COMBINED DRILL & COUNTERSINK - Std Qty Pack 12

Alfa Tools CDK50475 ASA# 3X4 ALFA USA HSS COMBINED DRILL & COUNTERSINK - Std Qty Pack 12

SKU: AT-CDK50475
MPN: CDK50475

Alfa Tools CDK50476 ASA# 3X5 ALFA USA HSS COMBINED DRILL & COUNTERSINK - Std Qty Pack 12

Alfa Tools CDK50476 ASA# 3X5 ALFA USA HSS COMBINED DRILL & COUNTERSINK - Std Qty Pack 12

SKU: AT-CDK50476
MPN: CDK50476

Alfa Tools CDK50477 ASA# 4X4 ALFA USA HSS COMBINED DRILL & COUNTERSINK - Std Qty Pack 12

Alfa Tools CDK50477 ASA# 4X4 ALFA USA HSS COMBINED DRILL & COUNTERSINK - Std Qty Pack 12

SKU: AT-CDK50477
MPN: CDK50477

Alfa Tools CDK50478 ASA# 4X5 ALFA USA HSS COMBINED DRILL & COUNTERSINK - Std Qty Pack 12

Alfa Tools CDK50478 ASA# 4X5 ALFA USA HSS COMBINED DRILL & COUNTERSINK - Std Qty Pack 12

SKU: AT-CDK50478
MPN: CDK50478

Alfa Tools CDK50479 ASA# 4X6 ALFA USA HSS COMBINED DRILL & COUNTERSINK - Std Qty Pack 12

Alfa Tools CDK50479 ASA# 4X6 ALFA USA HSS COMBINED DRILL & COUNTERSINK - Std Qty Pack 12

SKU: AT-CDK50479
MPN: CDK50479

Alfa Tools CDK50480 ASA# 5X5 ALFA USA HSS COMBINED DRILL & COUNTERSINK

Alfa Tools CDK50480 ASA# 5X5 ALFA USA HSS COMBINED DRILL & COUNTERSINK

SKU: AT-CDK50480
MPN: CDK50480

Save $38.95
Alfa Tools CDK50481 ASA# 5X6 ALFA USA HSS COMBINED DRILL & COUNTERSINK

Alfa Tools CDK50481 ASA# 5X6 ALFA USA HSS COMBINED DRILL & COUNTERSINK

SKU: AT-CDK50481
MPN: CDK50481

Save $43.74
Alfa Tools CDK50482 ASA# 6X5 ALFA USA HSS COMBINED DRILL & COUNTERSINK

Alfa Tools CDK50482 ASA# 6X5 ALFA USA HSS COMBINED DRILL & COUNTERSINK

SKU: AT-CDK50482
MPN: CDK50482

Save $41.87
Alfa Tools CDK50483 ASA# 6X6 ALFA USA HSS COMBINED DRILL & COUNTERSINK

Alfa Tools CDK50483 ASA# 6X6 ALFA USA HSS COMBINED DRILL & COUNTERSINK

SKU: AT-CDK50483
MPN: CDK50483

Save $50.59
Alfa Tools CDK50484 ASA# 7X6 ALFA USA HSS COMBINED DRILL & COUNTERSINK

Alfa Tools CDK50484 ASA# 7X6 ALFA USA HSS COMBINED DRILL & COUNTERSINK

SKU: AT-CDK50484
MPN: CDK50484

Save $94.29
Alfa Tools CDK50485 ASA# 8X6 ALFA USA HSS COMBINED DRILL & COUNTERSINK

Alfa Tools CDK50485 ASA# 8X6 ALFA USA HSS COMBINED DRILL & COUNTERSINK

SKU: AT-CDK50485
MPN: CDK50485

Save $118.18
Alfa Tools CDTC50450 ASA #0 CARBIDE COMBINED DRILL & COUNTERSINK

Alfa Tools CDTC50450 ASA #0 CARBIDE COMBINED DRILL & COUNTERSINK

SKU: AT-CDTC50450
MPN: CDTC50450

Save $18.06
Alfa Tools CDTC50451 3ASA # 1 CARBIDE COMBINED D RILL & COUNTERSINK

Alfa Tools CDTC50451 3ASA # 1 CARBIDE COMBINED D RILL & COUNTERSINK

SKU: AT-CDTC50451
MPN: CDTC50451

Save $17.59
Alfa Tools CDTC50452 ASA # 2 CARBIDE COMBINED DRILL & COUNTERSINK

Alfa Tools CDTC50452 ASA # 2 CARBIDE COMBINED DRILL & COUNTERSINK

SKU: AT-CDTC50452
MPN: CDTC50452

Save $21.96
Alfa Tools CDTC50453 ASA # 3 CARBIDE COMBINED DRILL & COUNTERSINK

Alfa Tools CDTC50453 ASA # 3 CARBIDE COMBINED DRILL & COUNTERSINK

SKU: AT-CDTC50453
MPN: CDTC50453

Save $26.69
Alfa Tools CDTC50454 ASA # 4 CARBIDE COMBINED DRILL & COUNTERSINK

Alfa Tools CDTC50454 ASA # 4 CARBIDE COMBINED DRILL & COUNTERSINK

SKU: AT-CDTC50454
MPN: CDTC50454

Save $37.28
Alfa Tools CDTC50455 ASA # 5 CARBIDE COMBINED DRILL & COUNTERSINK

Alfa Tools CDTC50455 ASA # 5 CARBIDE COMBINED DRILL & COUNTERSINK

SKU: AT-CDTC50455
MPN: CDTC50455

Save $67.12
Alfa Tools CDTC50456 ASA #6 CARBIDE COMBINED DRILL & COUNTERSINK

Alfa Tools CDTC50456 ASA #6 CARBIDE COMBINED DRILL & COUNTERSINK

SKU: AT-CDTC50456
MPN: CDTC50456

Save $92.09