Wrenches and sockets handle every bolted connection in your home, shop, and vehicles. Plumbing fittings, lag bolts, machine bolts on power tools, automotive work, deck hardware, furniture assembly — they all require wrenches. Building the right set means understanding SAE vs metric, socket drive sizes, wrench types, and where to spend money versus where to save.

Wrench and Socket Guide

SAE vs Metric: Buy Both

American homes contain both SAE (inch-based) and metric fasteners. Your car is metric. Your plumbing is SAE. Your imported power tools might be either. Lag bolts and carriage bolts at the hardware store are SAE. Machinery bolts on a Grizzly or Jet tool are metric.

Buying only SAE or only metric guarantees frustration. A 1/2-inch wrench is close to 13mm, but close is not correct — using the wrong size rounds bolt heads. Buy complete sets of both.

Socket Sets

A socket set is the core of your bolt-turning collection. A ratchet handle with a set of sockets covers more fastener sizes in less space than equivalent combination wrenches.

Drive Sizes

Socket sets are organized by the square drive size of the ratchet:

1/4-inch drive: Small sockets (4mm to 14mm, 3/16 to 9/16 inch). Low torque, high precision. Used for small machine screws, appliance repair, electrical panel hardware, and light automotive work.

3/8-inch drive: The sweet spot. Handles sockets from 6mm to 22mm (1/4 to 7/8 inch). Enough torque for most workshop and home repair tasks without being bulky. This is the primary drive size for a home shop.

1/2-inch drive: Heavy-duty. Sockets from 10mm to 32mm (3/8 to 1-1/4 inch). Handles lug nuts, large lag bolts, and heavy machinery. Paired with a breaker bar, it loosens the stuck fasteners that smaller drives cannot handle.

What to Buy

Start with a 3/8-inch drive set containing both SAE and metric sockets. The Tekton SKT15301 ($65) includes 45 sockets covering 6mm to 22mm and 1/4 to 7/8 inch. The GearWrench 80550 ($60) is equally solid. Both include a quality ratchet with a 72-tooth mechanism (5-degree swing arc) that works in tight spaces.

Add a 1/4-inch drive set for small fasteners: Tekton SKT05301 ($35) or a Husky set from Home Depot ($25).

Add a 1/2-inch drive only when you need it — heavy automotive, deck construction with large lags, or equipment maintenance.

Socket Types

6-point sockets grip all six flats of a hex bolt. Better grip, less chance of rounding. Use these for everything unless a 12-point is needed.

12-point sockets fit the bolt in twice as many positions, making them easier to get onto a bolt in tight spaces. But they grip only the corners, which can round the bolt head under high torque. Keep a set for convenience but reach for 6-point when torque matters.

Deep sockets extend over protruding threaded rod or long bolt shafts. Essential for plumbing applications and reaching nuts on threaded rod.

Combination Wrenches

A combination wrench has an open end and a box end of the same size. The open end slips onto a bolt from the side (useful in tight spaces), and the box end grips all faces like a socket (better for torque).

Essential sizes for SAE: 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4 inch.

Essential sizes for metric: 8, 10, 11, 12, 13, 14, 15, 17, 19mm.

The Tekton WCB94301 ($45 for a metric set) and GearWrench 81919 ($50 for a SAE set) are excellent mid-range options. Chrome vanadium steel, properly hardened, with polished faces that do not mark chromed fittings.

Wrenches go where sockets cannot — behind pipes, between frame members, on fittings where a ratchet does not fit. They are not redundant with a socket set. You need both.

Adjustable Wrenches

An adjustable wrench (Crescent wrench) fits any bolt size within its jaw range. Keep two in the shop:

8-inch adjustable — handles most fasteners up to 15/16 inch
12-inch adjustable — for larger fittings and plumbing connections

Adjustable wrenches are emergency tools. They grip well enough for moderate torque but round bolt heads more easily than fixed wrenches because the movable jaw has inherent play. Use fixed wrenches or sockets whenever possible. Use the adjustable wrench when you do not have the right fixed size or when working on odd-sized fittings.

The Channellock 8WCB ($20) and Crescent AC28VS ($18) are solid choices. Get ones with measurement markings on the jaw for quick size identification.

Specialty Wrenches Worth Having

Allen keys (hex wrenches): A set of L-shaped hex keys in SAE and metric covers set screws on router collets, machinery adjustments, furniture assembly, and tool maintenance. The Bondhus BriteGuard set ($15 for SAE, $15 for metric) is the standard. Ball-end Allen keys allow angled access — useful for tight spots.

Pipe wrench: For gripping round pipe. A 14-inch pipe wrench handles most residential plumbing tasks. Do not use a pipe wrench on hex fittings — the serrated jaws destroy finished surfaces.

Basin wrench: A specialty tool for reaching faucet mounting nuts in the tight space behind sinks. You will use it exactly once per faucet installation, and you cannot do the job without it.

Torque wrench: Applies a specific, measured amount of torque. Essential for automotive work (lug nuts, engine bolts) and any fastener with a torque specification. The Tekton 1/2-inch drive click torque wrench ($40) is accurate and affordable.

Quality and Storage

Where to Spend

Spend money on the ratchet mechanism. A quality ratchet with a fine-tooth mechanism (72 or 90 teeth) swings in tight spaces and does not slip under load. Cheap ratchets have 24 to 36 teeth and require wide swing arcs that make them useless between framing members and behind machinery.

Spend on combination wrenches if you do automotive or plumbing work regularly. Cheap wrenches flex under torque and spread, rounding bolt heads.

Where to Save

Socket quality varies less than wrench quality at the consumer level. A $60 Tekton socket set and a $120 Snap-on socket are both chrome vanadium steel, both within tolerance, and both last a lifetime in a home workshop. Save here.

Storage

Keep socket sets in their original molded cases or a drawer organizer with labeled slots. Loose sockets in a toolbox are a nightmare — you spend ten minutes finding the 13mm every time. Magnetic socket rails ($10 to $15) mounted in a drawer or on the tool wall keep everything visible and organized.

Hang combination wrenches on a tool roll, a dedicated wrench rack, or individual hooks. Throwing them in a drawer together leads to searching, scratching, and swearing.

Bottom Line

Buy a 3/8-inch drive socket set with SAE and metric sockets, a set of combination wrenches in both systems, two adjustable wrenches, and a set of Allen keys. Total investment: $120 to $180. This covers every fastener in a typical home, workshop, and vehicle. Add specialty wrenches as specific projects demand them.