HSS-E Cobalt construction for extended tool life and sharpness
135° split point design for precise drilling and reduced walking
Exceptional hardness, heat resistance, and wear resistance
Suitable for professional, industrial, and DIY use
Heavy-duty design for increased strength and drilling difficult materials
Available at
£ 12.74
Delivery
4 days
/
£ 3.30
£ 13.64
Delivery
2-7
/
£ 5.95
£ 14.32
Delivery
3 days
/
£ 3.99
£ 14.60
Delivery
1-2 days
/
£ 3.50
£ 25.96
Delivery
See provider
/
£ 2.59
Description
The Dormer A777 drill bits are designed for both professional and industrial use, offering reliable performance in high-stress environments. The 135° split point design reduces walking and ensures precise drilling, while the HSS-E cobalt construction extends tool life and maintains sharpness longer, even at high temperatures. Constructed from high-speed steel with 8% cobalt, these drill bits offer exceptional hardness, heat resistance, and wear resistance, making them ideal for demanding applications. The nominal diameter is 8.0 mm with an h8 tolerance. The overall length is 117mm and the working length is 75mm. These drill bits feature a standard spiral flute design, a bronze finish, and right-hand rotation/cutting. They are compatible with standard drill chucks and drill machines and suitable for drilling in metal, wood, and plastic materials. This pack contains 10 drill bits.
FAQ
The diameter of these drill bits is 8.0 mm with an h8 tolerance.
These drill bits are suitable for drilling in metal, wood, and plastic materials.
The point angle is 135°.
The overall length is 117mm.
This pack contains 10 drill bits.
twist drill bit
Top 10 twist drill bit compared 2026
Comparison Winner
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Bosch Professional 19-piece PointTeQ HSS Twist Drill Bit Set (for Metal, ProBox, Drill Driver Accessories)
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Bosch Professional 18pcs. HSS Twist Drill Bit PointTeQ (for Metal, in ToughBox, Ø 1-10 mm, Accessory Drill)
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Bosch Professional PointTeQ HSS Twist Drill Bit (for Metal, 10 x 87 x 133 mm, Accessories for Drill Driver)
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HPMAISON True 5% Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Twist Drill Bits 1.5mm-6.5mm, 135° Split Point Extremely Heat Resistant for Stainless Steel, Cast Iron, Hard Metal, Plastic, Wood
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13Pack HSS Twist Drill Bit Set Metric M35 Cobalt Steel High Speed Steel Titanium Coated Drill Bit Tool Extremely Heat Resistant with Straight Shank 1.5mm-6.5mm for Drilling Tool Wood, Metal & Plastic
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8pcs 200mm Extra Long Twist Drill Bits Straight Shank High-Speed Steel for Wood Plastic and Aluminum
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STROTON Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood
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5% Cobalt Drill Bit Set, M35 High Speed Steel Twist Drill Bits 135 Degree Split Point for Stainless Steel, Cast Iron, Hard Metal, Plastic and Wood(13Pcs)
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Linkstyle 31PCS Hand Drill Bit Set with 0.5-3mm Precision Pin Vise Drill, Micro Twist Drill Bits for Delicate Manual Work Electronic Assembling Model Making Woodworking Jewelry DIY
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Result
Model
Customer reviews
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Available at
Brand
Model
Colour
Size
Advantages
1
Comparison Winner
Result
Result
Good
05 / 2026
Model
Bosch 2607019675 15-Piece Mini-X-Line Twist Drill Bit Set (Wood, Masonry and Metal, Accessories for Drills) , Silver/Black , 157mm x 150mm x 20mm
Customer reviews
4.7 / 5 (91,118)
Check price
Amazon
Available at
£ 5.12
£ 8.50
£ 8.50
£ 8.50
£ 8.51
Brand
Bosch
Model
2607019675
Colour
Silver/Black
Size
157mm x 150mm x 20mm
Advantages
FEATURES Suitable drill bits for masonry, metal and wood COMES WITH Handy plastic box PRODUCT SPECIFICATION Total Length 157mm Working Length 150mm Diameter 20mm 5 MASONRY DRILL BITS 3 mm, 4mm, 5mm, 6mm, 8 mm 5 METAL DRILL BITS 3 mm, 4 mm, 5 mm, 6 mm, 8 mm 5 WOOD DRILL BITS 3 mm, 4 mm, 5mm, 6mm, 8 mm
2
Result
Result
Good
05 / 2026
Model
Bosch Professional 19-piece PointTeQ HSS Twist Drill Bit Set (for Metal, ProBox, Drill Driver Accessories)
Customer reviews
4.6 / 5 (7,947)
Check price
Amazon
Available at
£ 10.49
£ 11.95
£ 11.95
£ 14.99
£ 14.99
Brand
Bosch
Model
2608577351
Colour
multi-coloured
Size
Ø 1-10 mm
Advantages
Saves time The HSS Twist Drill Bit PointTeQ with reduced shank enables you to drill through metal quickly thanks to the special design of the drill bit tip
High durability The increased speed of the drill bit means less heat is built up, reducing wear
Precision work The self-centering PointTeq tip design prevents slipping and allows an easy and efficient start
3
Result
Result
Satisfactory
05 / 2026
Model
Bosch Professional 18pcs. HSS Twist Drill Bit PointTeQ (for Metal, in ToughBox, Ø 1-10 mm, Accessory Drill)
Customer reviews
4.4 / 5 (3,455)
Check price
Amazon
Available at
£ 12.99
£ 14.08
£ 14.67
£ 14.67
£ 15.06
Brand
Bosch
Model
2608577350
Colour
grey
Size
1-10 mm
Advantages
HSS Twist Drill Bit PointTeQ enables fast drilling in metal due to PointTeQ tip design
Self-centering tip prevents wandering, making quick and easy drilling starts possible
Increased drilling rate generates less heat and wear
4
Result
Result
Satisfactory
05 / 2026
Model
Bosch Professional PointTeQ HSS Twist Drill Bit (for Metal, 10 x 87 x 133 mm, Accessories for Drill Driver)
Customer reviews
4.6 / 5 (7,943)
Check price
Amazon
Available at
£ 2.00
£ 3.25
£ 3.31
£ 3.41
£ 3.59
Brand
Bosch
Model
2608577174
Colour
Colour
Size
Ø 10 mm
Advantages
Saves time The HSS Twist Drill Bit PointTeQ enables you to drill through metal quickly thanks to the special design of the drill bit tip
High durability The increased speed of the drill bit means less heat is built up, reducing wear
Precision work The self-centering PointTeq tip design prevents slipping and allows an easy and efficient start
5
Result
Result
Satisfactory
05 / 2026
Model
HPMAISON True 5% Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Twist Drill Bits 1.5mm-6.5mm, 135° Split Point Extremely Heat Resistant for Stainless Steel, Cast Iron, Hard Metal, Plastic, Wood
Customer reviews
4.4 / 5 (1,981)
Check price
Amazon
Available at
£ 9.99
£ 17.04
Brand
HPMAISON
Model
JY-7803
Colour
Gold
Size
1.5mm-6.5mm
Advantages
High Quality Material 5% Cobalt High Speed Steel M35 provide extended tool life compared to ordinary drill bits. Durable and strong for longer service using time.
Top Heat Resistant Our HSS Twist Drill Bits must be used and operated at 1500 RPM or greater for maximum efficiency. Straight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks.
Twist Design & Performance Precise 135 Split Point, gold oxide finish and round straight shanks. Manufactured to DIN338, prevent walking, clear chips and particles faster. Produced by precision fully ground which ensures chips move smoothly.
6
Result
Result
Satisfactory
05 / 2026
Model
13Pack HSS Twist Drill Bit Set Metric M35 Cobalt Steel High Speed Steel Titanium Coated Drill Bit Tool Extremely Heat Resistant with Straight Shank 1.5mm-6.5mm for Drilling Tool Wood, Metal & Plastic
Customer reviews
4.4 / 5 (1,871)
Check price
Amazon
Available at
£ 8.99
£ 15.32
£ 15.34
Brand
JTWEB
Model
Colour
Size
1.5mm to 6.5mm
Advantages
Extremely Heat Resistant twist drill bits Must be used and operated at 1500 RPM or greater for maximum efficiency. Straight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks
No Center Punch Is Needed The 135 Quick-Cut points are self-centering and penetrate quickly with less pressure. Twist drill bit kit Will not "walk" or "wander"
Faster Cutting and Longer Life Our Twist Drill Bit HSS are Manufactured from M35 cobalt steel, with molybdenum and cobalt added to creates a hardened alloy, measuring Rockwell hardness up to 67, for much faster cutting and extra longer life span, with up to 12 times when compared with an average HSS drill bit.
7
Result
Result
Satisfactory
05 / 2026
Model
8pcs 200mm Extra Long Twist Drill Bits Straight Shank High-Speed Steel for Wood Plastic and Aluminum
APPLICATION drill bits kit are great for most drilling jobs and materials such as aluminum, wood, plastics PVC and other different materials or your daily drill use.
QUANTITY This set includes 8 pieces drill bit in different sizes of the most popular drill bits.1 pc per size.
8
Result
Result
Satisfactory
05 / 2026
Model
STROTON Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood
Customer reviews
4.5 / 5 (901)
Check price
Amazon
Available at
£ 22.60
£ 37.81
Brand
STROTON
Model
M35-Co5-inch-S
Colour
Size
Advantages
9
Result
Result
Satisfactory
05 / 2026
Model
5% Cobalt Drill Bit Set, M35 High Speed Steel Twist Drill Bits 135 Degree Split Point for Stainless Steel, Cast Iron, Hard Metal, Plastic and Wood(13Pcs)
Customer reviews
4.2 / 5 (271)
Check price
Amazon
Available at
£ 16.87
£ 22.43
£ 23.72
Brand
shengbenhao
Model
shengbenhao-27
Colour
Size
Advantages
Premium True 5% Cobalt Steel with 68 HRC - 5% Cobalt High Speed Steel M35 provide extended tool life compared to ordinary drill bits. It Usually is able to Provide 3X Heat,Wear and Chip Resistance, durable and strong.
Professional and Widely Use - M35 Cobalt HSS Drill Bits Set is Particularly Suitable for Hardened Material or Heavy Duty Work, Such as Cutting through stainless steel, steel plate, iron sheet, titanium alloy, cast Iron, hardwood and hard plastics, and also can be used for softer materials.
Twist Design and Precise 135 Split Point Prevent walking, clear chips and particles faster.Produced by precision fully ground which ensures chips move smoothly.
10
Result
Result
Satisfactory
05 / 2026
Model
Linkstyle 31PCS Hand Drill Bit Set with 0.5-3mm Precision Pin Vise Drill, Micro Twist Drill Bits for Delicate Manual Work Electronic Assembling Model Making Woodworking Jewelry DIY
Customer reviews
3.9 / 5 (3,090)
Check price
Amazon
Available at
£ 6.99
£ 9.86
£ 10.77
Brand
Linkstyle
Model
LS-
Colour
Black
Size
Advantages
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