Buying car tools: how to choose the right set for maintenance and repairs

A good set of car tools can make many small maintenance jobs easier. Think changing a tyre, replacing a battery, changing the oil or loosening stuck bolts. But a large tool kit isn’t automatically right for your car or motorbike.

Look out for these three common pitfalls:

• Lots of pieces, but few useful sizes: a set may look impressive, yet be missing essential metric or deep sockets.
• Maximum torque mistaken for controlled tightening: an impact wrench is useful for loosening bolts, but it shouldn’t be used to tighten wheel bolts to the specified torque without checking.
• The wrong drive size or battery: a 1/4-inch ratchet set is compact, but it isn’t designed for heavy wheel bolts. Also check whether the battery, charger and accessories are included.

Which specifications matter?

1. Metric sizes and drive sizes

In the UK, cars and motorbikes usually require metric sockets, such as 10, 13, 17 and 19 mm. A set with SAE sizes only may therefore be less practical. A combination of metric and SAE sockets gives you more flexibility, but always check which sizes are actually included.

The drive size determines how much force and working space you have:

• 1/4 inch: suitable for small bolts, interior work and tight spaces.
• 3/8 inch: a versatile size for general maintenance.
• 1/2 inch: suitable for larger sockets and jobs that require more torque.

A socket set with several drive sizes is often more useful than a single ratchet set. Look out for extension bars, universal joints and deep sockets for bolts set further in.

2. Material and finish

Many car repair tools are made from chrome vanadium steel, often referred to as Cr-V. This material is used for sockets, ratchets and spanners because it combines hardness with wear resistance. A chrome or matt finish can help protect against corrosion, but it doesn’t make a tool maintenance-free.

S2 steel is sometimes specified for bits. According to the manufacturer’s product description, this material is designed to offer greater hardness and wear resistance. Also look for:

• Clearly legible size markings.
• A ratchet with a simple reversing mechanism.
• A locking or quick-release mechanism for sockets.
• A sturdy case or bag with a dedicated place for every piece.

Don’t use standard sockets with an impact wrench. You’ll need impact sockets designed for electric or pneumatic impact tools.

3. Torque, speed and control

A torque wrench is designed to tighten fasteners to a set torque. This is important for wheel bolts and other fasteners for which the vehicle manufacturer specifies a particular tightening torque. A torque wrench is not a replacement for an impact wrench.

An impact wrench or electric ratchet wrench is mainly designed to speed up loosening and tightening bolts. When buying one, check:

• The stated maximum torque in Nm.
• The drive size, such as 3/8 or 1/2 inch.
• Whether the torque can be adjusted.
• The battery capacity and whether a charger is included.
• The tool’s weight and length.

A high Nm rating doesn’t guarantee that every bolt can be handled safely or is suitable for the tool. When fitting fasteners, use the correct socket and check the final torque with a torque wrench if required by your vehicle’s specifications.

Recommended car tools for different users

Suitable for: Budget-conscious beginners

DURATECH 121-Piece Mechanics Tool Set

Why it suits this user: This set combines metric and SAE sockets with 1/4- and 3/8-inch ratchets. It’s suitable for basic work on cars and motorbikes, as well as household jobs.

How this product avoids the pitfall

The set contents are listed separately: 47 sockets, 40 bits, 18 hex keys and two extension bars. You can check in advance whether it includes what you need for your jobs.

Key benefit & highlights

Cr-V steel sockets, quick-release ratchets and a storage case with size markings.

Suitable for: Buyers looking for premium quality

WORKPRO 172-piece bit ratchet set

Why it suits this user: If you want one comprehensive case for working on cars, motorbikes and bicycles, as well as general garage maintenance, three drive sizes and a range of accessories come in handy.

How this product avoids the pitfall

The product description specifies 1/4-, 3/8- and 1/2-inch ratchets, deep sockets, Torx sockets, spark plug sockets and extension bars.

Key benefit & highlights

172 pieces, 72-tooth ratchets and S2 bits, according to the product specifications.

Suitable for: Specialist use & frequent users

CONENTOOL 21V Brushless Cordless Impact Wrench

Why it suits this user: This cordless impact wrench is a good fit for regular tyre changes and assembly work where speed and freedom of movement matter.

How this product avoids the pitfall

The specifications list three speeds, a variable-speed trigger, a 1/2-inch drive and five sockets included. Before use, check that the stated torque is suitable for your fasteners.

Key benefit & highlights

Up to 800 Nm, an LED light, two batteries and a storage bag, according to the product description.

Useful additions for your garage

Alongside a car tool set, specialist tools can save you time:

• An oil filter wrench for filters of a suitable diameter.
• A socket set with spark plug sockets and deep metric sockets.
• A torque wrench for controlled tightening.
• A car diagnostic scanner for reading fault codes and vehicle data. Check vehicle compatibility, the software update policy and language support in advance.
• A car emergency hammer with a seatbelt cutter. According to the Smosun Safehammer product description, it is designed for toughened side window glass; laminated front and rear windscreens are not covered.

Wear suitable eye and hand protection when working on mechanical parts, support a jacked-up car with axle stands, and follow the vehicle and tool manuals.

Frequently asked questions about car tools

What car tool set do I need as a beginner?

Start with a set containing metric sockets, 1/4- and 3/8-inch ratchets, extension bars, hex keys and screwdriver bits. A 1/2-inch drive is usually more practical for wheel bolts. Check the exact sizes required for your vehicle before buying.

Is an electric ratchet wrench the same as an impact wrench?

No. An electric ratchet wrench is usually compact and suitable for lighter assembly work in tight spaces. An impact wrench uses pulsing force and is designed for heavier fasteners. Neither automatically replaces a torque wrench for final tightening.

How long do car tools last?

Their lifespan depends on the material, workload, storage and maintenance. Use sockets with the correct drive size, don’t extend a tool with a loose pipe, and store your tools in the supplied case in a dry place. Cordless tools also have a limited battery life per charge, so check whether replacement batteries are available.