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AT ProBits® Multi-Step Drills

AT ProBits multi-step drills—often called step drill bits—are designed to drill and enlarge holes in thin materials using a single tool (application dependent). Step drills are commonly chosen for sheet metal, fabrication, and electrical work because they can create multiple hole diameters, help produce cleaner holes, and reduce the need to switch between multiple drill sizes. Many users also rely on step drills for controlled hole enlargement and light deburring after drilling.

Alfa Tools MBML12 3/16-7/8 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

Alfa Tools MBML12 3/16-7/8 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

SKU: AT-MBML12
MPN: MBML12

Save $38.03
Alfa Tools MBML12C 3/16-7/8 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

Alfa Tools MBML12C 3/16-7/8 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

SKU: AT-MBML12C
MPN: MBML12C

Save $40.34
Alfa Tools MBML12TN 3/16-7/8 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

Alfa Tools MBML12TN 3/16-7/8 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

SKU: AT-MBML12TN
MPN: MBML12TN

Save $46.63
Alfa Tools MBML12TNC 3/16-7/8 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

Alfa Tools MBML12TNC 3/16-7/8 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

SKU: AT-MBML12TNC
MPN: MBML12TNC

Save $48.94
Alfa Tools MBML13 1/8-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, AH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

Alfa Tools MBML13 1/8-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, AH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

SKU: AT-MBML13
MPN: MBML13

Save $24.50
Alfa Tools MBML13C 1/8-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, AH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

Alfa Tools MBML13C 1/8-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, AH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

SKU: AT-MBML13C
MPN: MBML13C

Save $26.81
Alfa Tools MBML13TN 1/8-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, AH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

Alfa Tools MBML13TN 1/8-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, AH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

SKU: AT-MBML13TN
MPN: MBML13TN

Save $27.64
Alfa Tools MBML13TNC 1/8-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, AH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

Alfa Tools MBML13TNC 1/8-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, AH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

SKU: AT-MBML13TNC
MPN: MBML13TNC

Save $29.95
Alfa Tools MBML3TNW 3PC . HEX SHANK TN PROBIT CARDED

Alfa Tools MBML3TNW 3PC . HEX SHANK TN PROBIT CARDED

SKU: AT-MBML3TNW
MPN: MBML3TNW

Save $97.84
Alfa Tools MBML3W 3PC . HEX SHANK PROBIT CARDED

Alfa Tools MBML3W 3PC . HEX SHANK PROBIT CARDED

SKU: AT-MBML3W
MPN: MBML3W

Save $80.40
Alfa Tools MBML6 3/16-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, BH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

Alfa Tools MBML6 3/16-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, BH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

SKU: AT-MBML6
MPN: MBML6

Save $20.66
Alfa Tools MBML6C 3/16-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, BH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

Alfa Tools MBML6C 3/16-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, BH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

SKU: AT-MBML6C
MPN: MBML6C

Save $22.97
Alfa Tools MBML6TN 3/16-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, BH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

Alfa Tools MBML6TN 3/16-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, BH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

SKU: AT-MBML6TN
MPN: MBML6TN

Save $25.31
Alfa Tools MBML6TNC 3/16-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, BH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

Alfa Tools MBML6TNC 3/16-1/2 PROBIT - MONOLOCK, 1/4" HEX SHANK, BH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

SKU: AT-MBML6TNC
MPN: MBML6TNC

Save $27.62
Alfa Tools MBML9 1/4--3/4 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

Alfa Tools MBML9 1/4--3/4 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

SKU: AT-MBML9
MPN: MBML9

Save $32.89
Alfa Tools MBML9C 1/4--3/4 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

Alfa Tools MBML9C 1/4--3/4 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

SKU: AT-MBML9C
MPN: MBML9C

Save $35.20
Alfa Tools MBML9TN 1/4--3/4 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

Alfa Tools MBML9TN 1/4--3/4 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, TUBED

SKU: AT-MBML9TN
MPN: MBML9TN

Save $41.52
Alfa Tools MBML9TNC 1/4--3/4 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

Alfa Tools MBML9TNC 1/4--3/4 PROBIT - MONOLOCK, 1/4" HEX SHANK, CH, HSS TiN COAT, 2 FLUTES, MULTI-STEP, BRIGHT, 1/CARD

SKU: AT-MBML9TNC
MPN: MBML9TNC

Save $43.83
Alfa Tools MBMLCO13 A 1/4 HEX SHANK COBALT PROBIT CN DRILL

Alfa Tools MBMLCO13 A 1/4 HEX SHANK COBALT PROBIT CN DRILL

SKU: AT-MBMLCO13
MPN: MBMLCO13

Save $26.93
Alfa Tools MBMLCO13C A 1/4 HEX SHANK COBALT PROBIT CN DRILL CARDED

Alfa Tools MBMLCO13C A 1/4 HEX SHANK COBALT PROBIT CN DRILL CARDED

SKU: AT-MBMLCO13C
MPN: MBMLCO13C

Save $29.24
Alfa Tools MBMLCO3W 3 PC . HEX SHANK COBALT PROBIT CARDED

Alfa Tools MBMLCO3W 3 PC . HEX SHANK COBALT PROBIT CARDED

SKU: AT-MBMLCO3W
MPN: MBMLCO3W

Save $88.21
Alfa Tools MBMLCO6 B 1/4 HEX SHANK COBALT PROBIT CN DRILL

Alfa Tools MBMLCO6 B 1/4 HEX SHANK COBALT PROBIT CN DRILL

SKU: AT-MBMLCO6
MPN: MBMLCO6

Save $22.72
Alfa Tools MBMLCO6C B 1/4 HEX SHANK COBALT PROBIT CN DRILL CARDED

Alfa Tools MBMLCO6C B 1/4 HEX SHANK COBALT PROBIT CN DRILL CARDED

SKU: AT-MBMLCO6C
MPN: MBMLCO6C

Save $25.03
Alfa Tools MBMLCO9 C 1/4 HEX SHANK COBALT PROBIT CN DRILL

Alfa Tools MBMLCO9 C 1/4 HEX SHANK COBALT PROBIT CN DRILL

SKU: AT-MBMLCO9
MPN: MBMLCO9

Save $35.23