Letter Jobbers' Drills | McMaster-Carr

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Letter

	System of Measurement System of Measurement	Hide

	Length Class Length Class	Show

	Jobbers' Length

	Length Class Length Class	Hide

Jobbers' Length

Short Length

Extended Length

	Drill Bit Size Drill Bit Size

1/4"

	Decimal Size Equivalent Decimal Size Equivalent

	For Use On For Use On

	Finish Finish

Black Oxide

Titanium Aluminum Nitride
(TiAlN) Coated

Titanium Nitride (TiN) Coated

Uncoated

	Material Material

Carbide

Cobalt Steel

High-Speed Steel

	Point Style Point Style

	Point Angle Point Angle

	Shank Type Shank Type

	Round

	Flute Direction Flute Direction

Right Hand

Left Hand

	Individual/Set Individual/Set

Individual

Set

	Bit Style Bit Style

	Spiral Flute
	Parabolic Spiral Flute

	Overall Length Overall Length

	Shank Size Shank Size

	Number of Pieces Number of Pieces

115

	Maximum Drilling Depth Maximum Drilling Depth

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Specifications Met Specifications Met

NAS

DIN

	Container Type Container Type

Metal Case

Metal Drawer Cabinet

	Number of Flutes Number of Flutes

	3

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401 Products

Drill Bit Decimal Size Equivalents

About Drill Bits

Drill Bits

These jobbers'-length bits have the rigidity and length required for most applications.

Cobalt Steel Drill Bits

Chip-Clearing Cobalt Steel Drill Bits

The parabolic spiral flutes lift chips out of the hole, reducing clogging and improving coolant flow.

Carbide Drill Bits

These jobbers'-length bits have the rigidity and length required for most applications.

Smooth-Finish Carbide Drill Bits

Three cutting edges instead of the typical two enable these bits to drill holes with a smoother finish than other bits.

Carbide-Tipped Drill Bits

These jobbers'-length bits have the rigidity and length required for most applications.

Drill Bits for Carbon Fiber, Fiberglass, and Graphite

These jobbers'-length bits have the rigidity and length required for most applications.

Drill Bits for Plastic

The sharp point allows for gradual penetration to reduce friction and eliminate cracking and chipping when drilling in plastic.

Drill Bit Sets

These jobbers'-length bits have the rigidity and length required for most applications.

Cobalt Steel Drill Bit Sets

Left-Hand Drill Bit Sets

Also known as reverse-flute bits, the flutes spiral in the opposite direction of other bits. Use in counterclockwise drilling applications such as removing broken screws.