Clarke CHT600 9-Piece TCT Core Drill Bit Set — Review

Overview

The Clarke CHT600 9-piece TCT core drill bit set is aimed at anyone who needs a range of common hole sizes for work in masonry, stone and concrete without buying single expensive bits. The set uses tungsten-carbide-tipped (TCT) cutters rather than plain HSS, which is a practical choice for abrasive materials. Supplied as a compact kit, it’s designed to be a sensible consumable purchase for occasional core drilling or as a backup selection for a tradesperson who already owns a compatible drill and arbor.

This review looks at what the CHT600 brings to the jobsite: its strengths, limitations and the scenarios where it makes sense to buy the bits rather than a dedicated core‑drilling machine. We also cover basic compatibility and usage considerations — things that will determine whether this set will perform well for your needs.

Who is this best for?

The Clarke CHT600 is a practical option if you fall into one or more of the following groups:

• DIYers who occasionally need to core holes in brick, block or plain concrete and don’t want to pay for single large bits.
• Tradespeople looking for a low-cost, compact set to carry for small jobs, repairs or irregular site needs.
• Anyone who already owns a compatible drill or arbor (for example, a rotary hammer with a core bit adaptor) and only needs consumable bits rather than a whole magnetic drill.

It’s less appropriate for users who expect to cut many large holes in reinforced concrete, or who need the accuracy and ease of use of a dedicated magnetic core drill. The bits will work for a lot of routine tasks, but they rely on your power tool and setup for stability and cooling.

Key features

Based on the product information supplied, the most important features of the CHT600 set are:

• Nine TCT-tipped core bits covering a set of common diameters — a range intended to meet a variety of everyday hole sizes without buying bits individually.
• Tungsten-carbide tip construction for increased wear resistance and faster cutting in abrasive masonry compared with plain HSS.
• Designed for cutting masonry, stone and concrete — the materials most homeowners and builders encounter when drilling holes for pipework, ducts, sockets and service penetrations.
• Compact and lightweight as a set, making it easy to store in a toolbox or carry between jobs.

The set is presented as a cost-effective consumable option. It does not include a machine, magnetic base, or other drilling hardware — so you’ll need to make sure the bits will fit your existing tooling or that you buy the correct adaptor separately.

Practical evaluation

When you’re deciding whether the Clarke CHT600 is the right choice, the practical points to think about fall into compatibility, expected material, job frequency and site practices such as dust control and cooling.

Compatibility: these are core drill bits, not a self-contained system. You will need a suitable arbor or mandrel to attach them to your drill or rotary hammer — check your machine’s spindle type and the arbor requirements for the bits. The set’s value depends on this being a straightforward match. If your drill requires a special adaptor or has an uncommon fitting, that can add cost and reduce convenience.

Material and cutting speed: TCT tips are a sensible middle ground for abrasive masonry work. Compared with plain high-speed steel they cut faster and last longer on materials such as brick, block and normal concrete. On plain, unreinforced concrete the bits will perform well for occasional penetrations. Where jobs involve reinforced concrete or you need many holes, diamond-core tooling or heavy-duty machine-mounted solutions are generally a better long-term choice.

Stability and accuracy: because these are consumable bits rather than a machine with an integrated stabiliser, hole accuracy depends on how you set up your drill. Using a good-quality escort — a drill stand, guide, or a firm hand with a pilot hole — helps. If you need perfectly straight holes or repeatable diameters, a magnetic core drill provides much better results because it clamps to the work and controls feed and alignment.

Cooling and dust: longer holes and harder materials generate heat and a lot of dust. Some TCT bits cope reasonably with dry cutting for quick or shallow holes, but for deeper or continuous work consider cooling (water) to extend bit life and a dust extraction strategy to comply with health and safety. Check the retailer listing for any specific guidance on water use with this set; not all bits are intended for wet cutting, and some adaptors are not water-resistant.

Durability: TCT tips are known for better wear resistance in abrasive materials, but they’re still a consumable. The set offers a cost-effective way to carry commonly used sizes, yet expect varying life depending on material hardness, presence of steel, and how you feed and cool the bit during cutting. Inspect the bit fits and seats, as quality can vary between economical sets — a loose fit wastes power and shortens tool life.

Strengths

• Low upfront cost compared with buying dedicated core-drilling machines or individual branded diamond bits — good for those on a budget.
• Multiple diameters in one compact kit make the set versatile for different job needs, avoiding the need to buy separate bits for each hole size.
• TCT tips give stronger wear resistance and generally faster cutting than plain HSS when working in abrasive masonry, which is the likely scenario for most buyers.
• Lightweight and easy to store — ideal for adding to a jobbox or taking on service visits.
• Sensible for occasional use: if you’re not doing high volumes of core-drilling, this set is a practical consumable solution.

Limitations

The Clarke CHT600 is not without drawbacks. Some are inherent to the nature of a consumable bit set rather than the product specifically, but they are important to weigh up.

• It’s not a machine — you need a compatible driver, arbor or drill stand. If you don’t already own the correct adaptors, that can add cost and complexity.
• Less effective on reinforced concrete and steel. TCT tips work best in abrasive masonry; where steel rebar is present, diamond-core bits or specialist rebar-cutting systems are usually required.
• No built-in stabilisation. Achieving clean, perpendicular holes depends on your setup and skill. For precision or repeatability, a magnetic drill or floor-mounted core rig is preferable.
• Potential need for water-cooling or dust control. Long or deep cuts generate heat and dust. If you plan many deep cores, consider wet cutting and proper extraction to protect health and prolong bit life.
• Bit-to-arbor fit and overall kit contents can vary. The set may not include an adaptor or case — check the product listing before you buy. Also inspect or ask about the fit quality if possible; poor seating can reduce efficiency and increase wear.

Pricing and value

The CHT600 is positioned as a budget-friendly, practical set. The guide price provided alongside the product information gives a flavour of its low-cost appeal. For buyers who only occasionally core holes or who already own the necessary drilling hardware, this set offers clear value compared with buying larger single bits or a dedicated magnetic drill.

Value depends on matching the set to your use-case. If you routinely drill large diameters, work in reinforced concrete or need a lot of precision, the true cost of using smaller, lower-cost bits could rise because of replacement frequency and extra labour — in those cases a higher-specification diamond set or a machine might be more economical over time.

Also remember the potential additional costs: adaptor or arbor if not included, suitable drill or rotary hammer, water-cooling or dust extraction equipment if you plan extended use, and personal protective equipment. Factor those into your total cost to judge whether the CHT600 still represents good value for your situation.

Note: offers and prices change frequently; always check the retailer page for current pricing and the exact list of items supplied in the set before buying.

Alternatives to consider

Before you decide, consider a few alternative approaches depending on your priorities:

• If you need high durability and performance in reinforced concrete, look at diamond-core bits and sets that are specifically rated for reinforced materials. Diamond tooling costs more but lasts longer and handles rebar much better.
• For accuracy and repeatability, a magnetic core drill (mag drill) is the logical step up. A mag drill clamps to steel or other ferrous surfaces and provides stable, perpendicular cuts — ideal for high-volume or precision work. Note that mag drills are machines, not consumables, and represent a significant additional investment.
• If you already have a good-quality rotary hammer or SDS drill, check for professional-grade core bit systems and arbors made to fit that specification. These often offer better sealing, cooling options and more precise fits than very cheap sets.
• If budget is your primary concern but you want improved bit life, consider higher-end TCT or segmented diamond bits sold singly for the most-used diameters. Buying the few sizes you actually use often makes more sense than owning a broad but cheap set.

Final verdict

The Clarke CHT600 9-piece TCT core bit set is a useful, low-cost entry into core drilling consumables. For DIYers, tradespeople on occasional jobs and anyone who already has compatible drilling hardware, it’s a sensible way to cover a range of common hole sizes without the expense of individual large bits or a dedicated machine.

Do not buy this set expecting the accuracy or ease of use of a magnetic core drill — the CHT600 relies on your drill, mounting method and technique. It’s best for fairly straightforward masonry work where abrasive wear is the main concern. If your projects include reinforced concrete, heavy daily usage or need very precise straight holes, look towards diamond tooling and a machine setup instead.

Overall, the Clarke CHT600 is a pragmatic choice: economical, portable and tailored to routine core-drilling tasks in masonry and stone. It makes the most sense when matched to the right tool and job. Check compatibility with your arbor or drill, plan for cooling and dust control for deeper work, and weigh the long-term costs against higher-grade diamond systems if you expect heavy use.

Remember: prices and offers can change, so check the retailer page for the latest information and to confirm exactly what is included in the set before you buy.