Best 3/8″ Drive Socket Sets

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If you only own one socket set, it should be a 3/8 socket set. The 3/8-inch drive sits between the delicate 1/4-inch and the bulky 1/2-inch, and it fits most of the fasteners in an engine bay: the 8, 10, 12, 13, 15, 17 and 19 mm bolts that hold on covers, brackets, sensors and accessories.

What separates a good 3/8 drive socket set from a frustrating one is coverage. You want every metric size from 8 to 19 mm with no gaps, deep sockets in those same sizes, 6-point sockets that won't round off a tight bolt, and a ratchet fine enough to work where you can only swing the handle a few degrees.

We compared six current 3/8-inch drive sets from GearWrench, Tekton and Craftsman on exactly those points, using each manufacturer's published contents.

Quick Picks

Comparison Table

All sockets in this table are 6-point.

The Best 3/8" Drive Socket Sets, Reviewed

1. GearWrench 80550 57-Piece Set: Best Overall

Who it's for: car owners who want one 3/8-inch set that covers almost everything above the oil pan.

The 80550 earns the top spot because its size list has no holes. GearWrench lists 13 standard SAE sockets from 1/4" to 1", 14 standard metric sockets covering every millimeter from 6 to 19 mm, plus deep sockets in both systems, with the deep metric run also going from 6 to 19 mm. Small sizes like 6 and 7 mm matter more than people expect on trim, intake and sensor hardware.

It's also the only set here with two ratchets. You get a standard-length teardrop ratchet with a low-profile head and flush reversing lever, and a stubby version for behind the radiator or under the dash. Both use a 90-tooth gear with a 4° swing. Extensions and a universal joint round it out, in a blow-molded case that GearWrench lists at about 12 lb, backed by a full lifetime warranty.

2. Tekton SKT15301 46-Piece Set: Best Value

Who it's for: DIYers who want the core sizes in standard and deep lengths without paying for sizes they'll rarely use.

Tekton trims the size list to what most cars actually use: 5/16" to 3/4" and 8 to 19 mm, in both shallow and deep 6-point sockets, with no skipped sizes. That's 42 sockets. The rest of the kit is a 90-tooth quick-release ratchet, 3" and 6" extensions and a universal joint.

The case is a step above typical blow-molded boxes. Tekton specifies high-density polyethylene with metal-pin hinges and molded size markings, so it's easy to see which socket is missing before you close the lid. Tekton lists the set at 7.79 lb, noticeably lighter than the 80550.

3. Tekton SKT13301 74-Piece Set: Best Organized

Who it's for: anyone with a tool chest who wants a 3/8 standard socket set that lives in a drawer, not a plastic case.

This is the widest size range in the group: 1/4" to 1" and 6 to 24 mm, in standard and deep lengths. The extra metric sizes above 19 mm cover larger brake, suspension and accessory hardware that 3/8-inch sets usually leave to 1/2-inch drive.

Instead of a case, the sockets ride on rails and trays (Tekton says the rails and trays are made in the USA, the sockets and ratchet in Taiwan). You also get a 90-tooth ratchet, extensions, a universal joint and a magnetic hex bit holder. If you already own a ratchet you like, Tekton also sells similar socket-only rail sets.

4. GearWrench 80550P 56-Piece 120XP Set: Best Fine-Tooth Ratchet

Who it's for: people who regularly work in cramped engine bays and want the smallest swing they can get.

The 80550P is the 80550 with GearWrench's 120XP ratchet, which uses two stacked 60-tooth pawls to give 120 positions and a 3° swing arc. GearWrench itemizes it as 13 standard SAE sockets (1/4" to 1"), 14 standard metric sockets (6 to 19 mm), 11 deep SAE sockets (1/4" to 7/8"), 14 deep metric sockets, one ratchet, two extensions and a universal joint.

You lose the stubby ratchet that comes with the 80550, so this is the better buy if fine ratcheting matters more than handle length. It replaces Milwaukee's 48-22-9008 in this guide: on Amazon we only found look-alike sets sold under that part number, not a listing we could confirm as Milwaukee's.

5. GearWrench 84916N 44-Piece Impact Set: Best 3/8" Impact Set

Who it's for: owners of a 3/8-inch cordless impact wrench or impact ratchet.

Chrome sockets don't belong on an impact tool, so if you've bought a compact 3/8-inch impact, this is the set to pair with it. GearWrench lists SAE sizes from 5/16" to 3/4" and metric sizes from 8 to 19 mm plus 21 mm, in standard and deep lengths. They're chrome-molybdenum impact sockets with off-corner loading to reduce rounding.

Each socket has laser-etched markings with secondary hard-stamped sizes, so you can still read them after the laser marking wears. They come in a blow-molded case with a full lifetime warranty. There's no ratchet, so this is a set for your impact tool or for adding to an existing kit.

6. Craftsman CMMT12113 33-Piece Set: Best Budget

Who it's for: someone who needs a basic 3/8 drive socket set for occasional jobs, or a spare for a second vehicle.

Craftsman lists 10 metric and 10 SAE 6-point shallow sockets (10 to 19 mm and 5/16" to 7/8"), a low-profile 72-tooth ratchet with a 5° swing and a head Craftsman says is up to 25% thinner than its CMMT81748 ratchet, a 3" extension, a bit driver and 10 bits. The blow-molded case has metal hinges and is sized to fit Craftsman's metal storage boxes. Craftsman lists a full lifetime warranty.

The trade-offs are real. There are no deep sockets, so nuts on long studs will stop you, and metric starts at 10 mm. Treat it as a starter kit, not a lifetime set.

3/8 Socket Set Buying Guide

Why 3/8-Inch Drive First

The 3/8-inch drive handles the widest range of everyday car and equipment fasteners while keeping the ratchet head small. A 1/4-inch ratchet is better for small trim screws and sensor bolts, and a 1/2-inch ratchet is better for lug nuts and suspension. If you want the bigger picture across drives, our best socket set guide compares all three, and our socket size chart shows which sizes usually live on which drive.

Size Range and Gaps

Read the size list before anything else. For a modern car, you want 8 through 19 mm with no gaps. The 6 and 7 mm sizes help on trim and small brackets, and 21 to 24 mm sizes show up on larger brake and suspension hardware. Watch for sets that jump from 17 to 19 mm or skip 11 and 16 mm, a common shortcut in cheap kits. Among the picks here, the 84916N skips 20 mm, and the Craftsman starts at 10 mm.

Standard and Deep Sockets

A 3/8 standard socket set with no deep sockets will stall you the first time you meet a nut on a long stud, such as exhaust or strut hardware. Five of the six sets here include deep sockets. If you already own a standard set, our deep socket set guide covers add-on deep sets.

6-Point vs 12-Point

All six picks are 6-point. A 6-point socket grips the flats of a hex fastener, so it's much less likely to round a tight or rusty bolt. 12-point sockets engage in more positions but are better kept as a second set for 12-point fasteners.

Ratchet Tooth Count

More teeth means a smaller swing before the ratchet catches. A 72-tooth ratchet needs 5°, a 90-tooth ratchet needs 4°, and 120-position designs like GearWrench's 120XP need 3°. In a tight engine bay, 90 teeth is a good baseline. The GearWrench 80550 adds a stubby ratchet, which helps as much as tooth count when space is short.

Chrome or Impact

Chrome sockets are for hand ratchets. If you use a 3/8-inch impact wrench or impact ratchet, use impact sockets like the GearWrench 84916N. Impact sockets also work on hand ratchets, but they're thicker and heavier, so they can be harder to fit in tight spots. Our impact socket set guide explains the difference in steel and design.

Storage

Blow-molded cases are portable but bulky. Rails and trays, like Tekton's SKT13301, make more sense once you own a tool chest. Pick the storage that matches where the set will live.

Building Out From 3/8"

Once your 3/8-inch set is in place, add a 1/4" drive socket set for small fasteners and a 1/2" drive socket set for wheels, axles and suspension. Buying them separately lets you pick the best set in each size, rather than accepting the compromises of an all-in-one kit.

How We Chose

We compared current 3/8-inch drive socket sets from GearWrench, Tekton and Craftsman using each manufacturer's published contents and specs: every socket size included, skipped sizes, deep socket coverage, 6- or 12-point design, ratchet tooth count and swing arc, storage type and listed warranty. We also weighed recurring owner feedback patterns on 3/8 socket sets, such as case durability and missing sizes. We did not test these sets ourselves; where a manufacturer doesn't publish a spec, we leave it out.

FAQ

Verdict

The GearWrench 80550 is the best 3/8 socket set for most people: every metric size from 6 to 19 mm in standard and deep, SAE to 1", and both a standard and a stubby 90-tooth ratchet. The Tekton SKT15301 covers the core 8 to 19 mm range for less, and the Tekton SKT13301 is the pick if your sockets will live in a tool chest drawer.