Clarke PRO357 18-Piece Socket Set Review: A Budget 3/8-Inch Kit for Home Mechanics

Anyone who spends time under a bonnet knows the moment: you reach for the right socket, and it isn't there. The PRO357 from Clarke is aimed squarely at that problem, and at £21.99 it's a low-risk way to sort out a jumbled tool roll.

The kit is a 18-piece 3/8-inch drive set. The core of it is 16 sockets, with eight each of the most common sizes in both measurement systems. Metric runs from 10mm to 19mm, and imperial runs from a quarter inch up to 11/16 inch. Every socket uses a standard ⅜-inch drive, so they all fit the included ratchet and any other ⅜-inch drive tool you already own.

Why the size mix matters

Eight of each size is a sensible split for a starter kit. Most routine jobs, such as brake caliper bolts, wheel-related fasteners, battery terminals, engine covers and interior trim, cluster around a handful of sizes. Those are the ones you'll reach for repeatedly, so having two of each means a spare is already in the box when one goes missing down the side of a wheel arch.

The metric and imperial split is the bit that makes this set more useful than a single-system kit. Plenty of cars on UK roads still mix measurement systems, particularly older British models, some imports and anything that's been rebuilt over the years. Owning both sets means you aren't forced to dig out a second kit halfway through a job. The trade-off is that the sizes are spread across a fairly narrow band. If you regularly work on machinery or fasteners outside 10–19mm or a quarter inch to 11/16 inch, you'll want to look at the larger kits Clarke also sells.

The ratchet and extension bar

The included standard-length ratchet is reversible, which is the feature that matters most once you're working in a tight space. Reversing the direction lets you back a fastener off without pulling the tool out of the joint and repositioning it. The rubber grip handle is a practical addition too. Hands get greasy and cold in a garage, and a grip that stays put makes a real difference over an afternoon of work.

The extension bar is the other part that earns its place. Most stubborn fasteners in an engine bay sit behind something, under a bracket or down by the firewall. A short extension lets you get the socket onto the nut without wrestling the ratchet head into a gap it doesn't fit. It won't replace a proper set of extensions in different lengths, but for a kit at this price, having one at all is useful.

Materials and the guarantee

Clarke says the sockets, ratchet and extension bar are all made from chrome-plated vanadium steel. Vanadium steel is a common choice for hand tools because it holds up well to repeated loading and resists wear at the drive faces, which is where cheap sockets tend to round off first. Chrome plating adds corrosion resistance, which helps if the set lives in a damp garage or a shed.

Every piece is covered by Clarke's Pro Tool lifetime guarantee, which covers manufacturing and mechanical defects. Lifetime warranties on hand tools are only as useful as their terms, so it's worth reading the conditions before you buy or keep the proof of purchase with the box. Still, a warranty of this kind is a good sign that the maker expects the tools to last.

Storage and who it suits

The set comes in a compact plastic holder. It's small enough to slip into a larger toolbox or a jacket pocket, and it can be hung on a wall if you'd rather keep things visible. That's a bigger deal than it sounds. A socket kit that lives in a loose drawer tends to spread across the drawer within a few months, and the moment sizes go missing is when the frustration starts. Keeping every piece in its own slot is the simplest way to stop that.

For seasoned mechanics, the PRO357 works best as a backup or a loan kit for a second car, a shed or a family member's toolbox. For someone just starting out with basic servicing, such as oil changes, brake pads or battery swaps, it covers most of what's needed without a large outlay. Anyone planning to take on heavier jobs will eventually want a bigger range and a few more drive sizes, but this is a solid place to start.

If you're ready to buy, the set is available from Machine Mart at £21.99. Check the listing for current stock before you order, as availability can change.

My read is that the PRO357 solves the everyday problem it's designed for. It won't make a professional workshop obsolete, and it doesn't need to. What it does offer is a tidy, well-sized kit with the right mix of measurements, a useful ratchet and extension, and a storage case that actually keeps the sockets where you left them.