What are the best high-quality drill bit sets for professional use?
This page compares 7 high-quality drill bit sets with verified specifications and prices. Top options include Milwaukee Cobalt Red Helix Drill Bit Set for Drill Drivers, 15-Piece, Model 48-89-2370, Milwaukee SHOCKWAVE Impact-Duty Titanium Twist Drill Bit Set (15-Piece), Model# 48-89-4630, Milwaukee Cobalt Red Helix Drill Bit Set for Drill Drivers, 29-Piece, Model 48-89-2332. Prices range from £22 to £72. All data is sourced from manufacturer documentation and specialist retailers.
| Product ⇅ | Price ⇅ | Bit Count ⇅ | Max Drill Size (mm) ⇅ | Material ⇅ | Speed (RPM) ⇅ | Keyed Holes ⇅ | Set Inclusions ⇅ |
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Milwaukee Cobalt Red Helix Drill Bit Set for Drill Drivers, 15-Piece, Model 48-89-2370
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£36.87 ≈ | 15 | 3/8 in | Cobalt | — | — | — |
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This 15-piece cobalt set uses a Quad Edge tip, Variable Helix flute, thicker tapered web, and 3-flat Secure-Grip shank for durable drilling and rapid chip removal. It is designed for drill drivers and demanding materials such as stainless steel, cast iron, thick metal, wood, and plastics. ★ Ideal forThis set suits professional use because its cobalt construction, 15X life versus black oxide bits, heat-reducing Variable Helix flute, and durable thicker tapered web are designed for repeated drilling in hard metals.
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Milwaukee SHOCKWAVE Impact-Duty Titanium Twist Drill Bit Set (15-Piece), Model# 48-89-4630
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£22.11 ≈ | 15 | 3/8 in | Titanium | — | — | — |
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Milwaukee SHOCKWAVE RED HELIX titanium twist drill bits are built for durability and long life, with a QUAD EDGE 135° split point for a precision start. The variable helix design supports rapid chip removal and reduced heat buildup, helping maintain sharper performance. This 15-piece set fits drills and impact drivers using 1/4 in hex shanks and suits a range of drilling tasks in wood, plastics, and metals. ★ Ideal forFor professional use, the 15-piece SHOCKWAVE RED HELIX titanium set is impact-duty and uses 1/4 in hex shanks plus a variable helix (35° to 15°) and QUAD EDGE 135° split point for faster chip removal and precision starts across demanding materials.
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Milwaukee Cobalt Red Helix Drill Bit Set for Drill Drivers, 29-Piece, Model 48-89-2332
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£72.31 ≈ | 29 | 1/2 in | Cobalt | — | — | — |
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This 29-piece set contains cobalt drill bits with QUAD EDGE tips, VARIABLE HELIX flutes, thicker tapered webs, 135-degree split points, and 3-flat secure-grip shanks. It is designed for drill drivers and suits professionals drilling hard metals, stainless steel, cast iron, wood, and plastics. ★ Ideal forIt suits professional use because it provides 29 heavy-duty cobalt bits from 1/16 in to 1/2 in, a 135-degree split point, rapid-chip-removal VARIABLE HELIX geometry, and a durable PACKOUT-compatible case.
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Milwaukee Cobalt Red Helix Twist Drill Bit Set for Drill Drivers, 23-Piece, Model 48-89-2338
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£55.32 ≈ | 23 | 3/8 in | Cobalt | — | — | — |
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This 23-piece set uses cobalt alloy bits with a 135-degree split-point tip, variable-helix flutes, and 3-flat Secure-Grip shanks. It is designed for drilling hard metals, PVC, and wood, making it suitable for professionals and serious users who need durable bits for drill drivers. ★ Ideal forIt suits professional use because its cobalt construction is rated for up to 15X the life of black oxide bits, while the variable-helix flute, 135-degree split point, tapered web, and 3-flat shank support fast, accurate drilling in hard metals.
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Milwaukee Cobalt Drill Bit Set, 14-Piece, Model 48-89-0026
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£36.89 ≈ | 14 | 1/2 in | Cobalt | — | — | — |
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This 14-piece cobalt set includes Thunderbolt and Cobalt Red Helix bits with 135-degree split points, thicker webs, parabolic flutes, and 3-flat Secure-Grip shanks. It is suited to professional users drilling stainless steel, high-alloy steel, cast iron, wood, plastic, and PVC. ★ Ideal forIt suits professional use because the cobalt construction, thicker web, 135-degree split point, chip-clearing flute design, and 3-flat Secure-Grip shank support durable and accurate drilling in hard metals.
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Bosch Cobalt M42 Twist Drill Bit Set with Case, 14-Piece, Model CO14B
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£31.36 ≈ | 14 | 1/2 in | M42 cobalt alloy, 8% cobalt | — | — | — |
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This 14-piece set uses heat-resistant M42 cobalt alloy bits designed for stainless steel, cast iron, titanium, and other hard metals. Jobber-length bits feature surface-hardened tips, a thick web-helix design, split points, and three-flat shanks for stability and grip, making the set suitable for demanding professional metalworking. ★ Ideal forIt suits professional use because the 8% cobalt M42 alloy, high-heat resistance, surface-hardened tips, thick web-helix design, and sizes up to 1/2 in are built for repeated drilling in hard metals.
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Drill Bit Warehouse 14-Piece High-Speed Steel Drill Bit Set, M2 HSS
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£36.82 ≈ | 14 | 1/2 in | M2 high-speed steel | — | — | — |
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This USA-made set uses precision-ground M2 high-speed steel with a black oxide finish for durable drilling in metal, wood, and plastic. It suits professionals and serious DIY users who need compact coverage from 1/16 in to 1/2 in and 1/4 in hex-compatible reduced-shank bits. ★ Ideal forIt suits professional use through its durable M2 HSS construction, black oxide finish, precision-ground bits, 1/2 in maximum drilling capacity, and rugged molded storage case.
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