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EFFICERE8-Piece Premium 1/2” Reduced Shank Silver and Deming Large Drill Bit Set in Aluminum Carry Case, M2 High Speed Steel, 135-Degree Split Point | SAE Inch Size 9/16” - 1” by 1/16th Increment

EFFICERE8-Piece Premium 1/2” Reduced Shank Silver and Deming Large Drill Bit Set in Aluminum Carry Case, M2 High Speed Steel, 135-Degree Split Point | SAE Inch Size 9/16” - 1” by 1/16th Increment

Q: Will these drill hard stainless steel?

Probably not. The bit set I received did not drill aluminum, until I honed the cutting edge with a very fine grit diamond file, because the cutting edge had small burrs (incomplete final machining). The bits are labeled HSS (high speed steel), which is ordinarily good for cutting most stainless steels, when the bit cutting edges are honed razor sharp without residual burrs. So this inexpensive bit set is good for the machinist who can finish the honing of the cutting edges with a diamond file or a diamond drill bit sharpener.

Q: Are these actually cobalt? if so, why don't they say hss-co or m35/m42?

Keep shopping. These are the worst bits I've bought off amazon. Half of them were slightly bent (they would wobble in my drill press). The ones that were straight, were very sharp the first use. The cutting edges got dull pretty quick. I'm an auto mechanic/fabricator/machinist so I do know how to use drill bits the correct way.

Q: Can it drill through Brick?

My answer would be no. These bits are primarily for drilling metal. They will drill wood, plastic and like products but they are NOT designed for drilling masonry which would include concrete, concrete blocks, and brick.

Q: Which bits are better? The ones in aluminum case or wood case.

So for I have only used one of the bits and it did a good job. I don’t know anything about the ones it the wooden box the ones I have are in the aluminum case. I have been a machinist for 40 years but I am retired now and the bits in the aluminum case are some of the best looking ones I’ve ever seen for the price. They have flats cut on the shank so they don’t spin in the chuck and they were very sharp. I hope I have answers your question for you.

Product ID: 47730465

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Details

Material
Metal
Cutting Diameter
9/16” 5/8” 1”
Finish Type
Gold Titanium
Shank Type
3-Flat
Cutting Angle String
135 Degrees

⏩135° split point for faster drilling

⚙️M2 Cobalt HSS for max durability

🛠️Tri-flat shank locks securely

Frequently Bought Together

EFFICERE 8-Piece Premium 1/2” Reduced Shank Silver and Deming Large Drill Bit Set in Aluminum Carry Case, M2 High Speed Steel, 135-Degree Split Point | SAE Inch Size 9/16” - 1” by 1/16th Increment

Tap Magic 30004P ProTap Cutting Fluid, 4 oz. Size

CaRoller 29Pcs Cobalt Drill Bit Set, 135 Degree Tip High Speed Steel with Black and Gold Finish, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-1/2"

Description

🔩 Drill Like a Pro, Finish Like a Boss!

CHIP CLEARING MASTERY - Deep spiral grooves rapidly eject debris, keeping your workflow smooth and uninterrupted.
ORGANIZED PORTABILITY - Sleek aluminum carry case keeps all 8 large-diameter bits (9/16” to 1”) neatly stored and ready for any project.
PRECISION SPEED DRILLING - 135° split point design ensures self-centering, eliminating walking and boosting drilling efficiency.
INDUSTRIAL GRADE STRENGTH - Crafted from premium M2 cobalt high speed steel for unmatched durability across wood, metal, and plastics.
UNIVERSAL FIT SECURE GRIP - 1/2” reduced shank with unique tri-flat end locks tightly into all drill presses and power tools—no slippage, no fuss.

The EFFICERE 8-Piece Premium Drill Bit Set features industrial-grade M2 cobalt high speed steel construction with a 135° split point for fast, precise drilling. Its gold titanium and black nitride dual coating enhances durability and corrosion resistance by 80%. Designed with a 1/2” reduced tri-flat shank, these bits fit securely in all drill presses and power tools. The set includes eight large sizes from 9/16” to 1” housed in a durable aluminum case, perfect for professionals demanding reliability and efficiency across multiple materials.

Specifications

Material	Metal
Cutting Diameter	9/16”, 5/8”, 11/16”, 3/4”, 13/16”, 7/8”, 15/16”, 1” Inches
Finish Type	Gold Titanium and Black Nitride Dual Coating
Shank Type	3-Flat
Cutting Angle String	135 Degrees
Brand	EFFICERE
Tool Flute Type	Spiral
Point Style	Split Point
Surface Recommendation	Aluminum, Copper, Metal, Plastic, Stainless Steel, Wood
Number of Flutes	8
UPC	858574007136
Unit Count	1.0 Count
Manufacturer	UPHILL MERCHANDISE LLC
Number of Pieces	8
Part Number	DL-001
Item Weight	1 pounds
Package Dimensions	10.04 x 8.32 x 1.93 inches
Item model number	DL
Is Discontinued By Manufacturer	No
Size	8-Piece Set in Aluminum Case
Color	Gold and Black
Finish	Gold Titanium and Black Nitride Dual Coating
Item Package Quantity	1
Head Style	Tri-Point
Blade Length	6 Inches
Measurement System	Inch
Special Features	Laser Etched Marking
Included Components	8-Pc. Large and Jumbo Drill Bits: 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1”
Batteries Included?	No
Batteries Required?	No

Have a Question? See What Others Asked

Will these drill hard stainless steel?

Are these actually cobalt? if so, why don't they say hss-co or m35/m42?

Can it drill through Brick?

Which bits are better? The ones in aluminum case or wood case.

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