Bosch Professional 7-Piece CYL-3 Concrete Drill Bit Set (Ø 4–10 mm) for Impact Drills
Product description
What it is and what it’s for
This Bosch Professional 7-piece CYL-3 concrete drill bit set is aimed at practical drilling through tougher masonry materials, such as concrete, brick and lime sand brick. If you’ve ever tried to drill a clean dowel hole and felt like the bit just doesn’t want to play ball, this set is built around the kind of “hold up under impact” performance that heavy-duty use demands.
On paper, the whole point is simple: you get several carbide-tipped bit sizes in one place, and they’re designed specifically for impact drills rather than standard drill-only work. That makes it a sensible buy for anyone installing fixings into walls where you need reliable penetration without constant re-drilling.
The essentials at a glance
The set covers seven diameters: Ø 4, 5, 6, 6, 7, 8 and 10 mm. Yes, there are two 6 mm bits in the pack, so you’re covered if you lose one, or you just prefer having a duplicate for the size you use most.
Bosch positions these as high-performance, hammer-proof drill bits. They use carbide tips with two cutters, and they’re described as offering good resistance and durability, plus effective dust removal thanks to a 2-flute U-shape. In real-world terms, that’s the sort of design that can help you keep drilling steadier and reduce the “choking up” feeling you get when dust clears poorly.
What stands out in use
The most reassuring thing about this set is the focus on impact drilling. Concrete and masonry drilling isn’t just about sharpness, it’s about coping with hammering forces repeatedly. These bits are described as hammer-proof according to ISO 5468, which suggests they’re intended for professional-style conditions rather than occasional DIY.
They’re also described as particularly effective when drilling dowel holes. For typical home and workshop jobs—hanging shelves, mounting brackets, fitting rails or securing cable routes—dowel holes are exactly the kind of task where having the right diameter matters, and where poor dust clearing can quickly turn a 10-minute job into a frustrating one.
A small practical example: imagine you’re marking out fixing points for a wall-mounted TV bracket. You start with a smaller hole (say Ø 4 or Ø 5 mm) to confirm alignment, then move up to the correct size once you’re happy with the position—this set is built around that kind of step-by-step work.
Tech specs (quick, relevant details)
- Name: Bosch Professional 7-Piece CYL-3 Concrete Drill Bit Set
- Type: Concrete/masonry drill bit set for impact drills
- Format: 7-piece set, carbide tipped
- Size: Drill bit diameters Ø 4 / 5 / 6 / 6 / 7 / 8 / 10 mm
- Material: Durable carbide (two cutters)
Compatibility & requirements
Compatibility is stated as: the bits can be used in all impact drills. That’s the key requirement here—if you only own a regular drill, these won’t be the right direction.
Also, because concrete and masonry work is sensitive to technique, it’s worth bearing in mind that results will still depend on matching the hole size to your fixing and using sensible drilling practice (steady pressure, letting the bit do the work, and clearing dust as you go). The set helps, but it doesn’t remove the need for basic care.
Where it shines, and where it may fall short
If you frequently drill into concrete, masonry or lime sand brick and you already use an impact drill, this set looks like a straightforward value-for-money way to stock the sizes most people reach for.
That said, it may not be the best choice if: - You only need one or two diameters occasionally, because a set can be more than you actually use. - You’re hoping for a solution for non-impact drilling—these bits are clearly intended for hammering/impact applications. - Your jobs are very specialised, since the pack is limited to the given Ø range (rather than offering a broader assortment).
On balance, it sits in the “proper workhorse” bracket for masonry drilling rather than a minimal entry-level kit.
Is it worth it?
Worth buying if you want a ready-to-go assortment of carbide concrete drill bits for an impact drill, especially for dowel holes and repeated wall-fixing jobs. The stated hammer-proof durability, two-cutter carbide design, and dust-removal focused 2-flute U-shape are the kind of details that matter when you’re drilling masonry rather than just light DIY.
Better avoided if you don’t plan to use an impact drill, or if you only need one specific bit size. In those cases, you might be paying for diameters you won’t touch.
Mini FAQ
Frequently asked questions
1) Are these bits suitable for concrete and brick?
Yes—this set is described for concrete, masonry and lime sand brick.
2) Do they work with impact drills only?
The compatibility given is for all impact drills, so that’s the use case it’s meant for.
3) What sizes are included?
The pack includes Ø 4, 5, 6, 6, 7, 8 and 10 mm.
4) Are they good for dowel holes?
They’re described as particularly effective for drilling dowel holes.