The best 3/8-inch deep socket depends on the fastener sizes you use and whether you need SAE, metric, or both. MIXPOWER offers broad metric and SAE ranges, while PGROUP provides organized sets with a storage rack. DEWALT combines SAE and metric sockets in one kit, and CRAFTSMAN is a single-size option for buyers replacing one socket.
| Product | Best For | Coverage |
|---|---|---|
| MIXPOWER Metric | Metric deep-socket range | 7–19 mm, 13 pieces |
| PGROUP SAE | Organized SAE storage | 5/16–7/8 inch, 10 pieces |
| MIXPOWER SAE | SAE impact-socket set | 5/16–1 inch, 12 pieces |
| DEWALT 20-Piece | Combined SAE and metric kit | SAE and metric |
| CRAFTSMAN 3/8-Inch | One replacement socket | 3/8 inch, SAE |
MIXPOWER 13-Piece Metric Deep Socket Set
This set includes 13 deep, 6-point sockets from 7 mm through 19 mm. MIXPOWER says the sockets are made from drop-forged, heat-treated CR-V steel and have a black phosphate finish. The radius-corner design is intended to apply force to fastener flats rather than corners.
Best for: Buyers who need a broad metric range in one 3/8-inch drive set. The size progression makes it a useful option when work involves several common metric sizes. The product is described as an impact socket set, but the provided details do not specify an impact-tool rating; verify the tool requirements before use.
PGROUP 10-Piece SAE Deep Socket Set
The PGROUP set covers SAE sizes from 5/16 inch to 7/8 inch, with ten 6-point sockets. Its listed features include heat-treated CR-V steel, mirror chrome plating, and a plastic rack with a mounting bracket. The sockets have large, permanent size markings for identification.
Best for: Buyers who want SAE deep sockets stored together on a rack. The 6-point opening is designed to grip fastener flats, and the rack helps keep the pieces arranged. Choose another option if you need metric sizes or a stated impact-socket design; this listing describes chrome-plated sockets, not impact sockets.
MIXPOWER 12-Piece SAE Impact Socket Set
This deep, 6-point set includes sizes from 5/16 inch to 1 inch. The listed construction is drop-forged, heat-treated CR-V steel with a black phosphate finish. MIXPOWER also describes a radius-corner design intended to engage fastener flats and reduce corner damage.
Best for: Buyers who need a wide SAE range and want a product specifically listed as an impact socket set. Its 12 sizes extend to 1 inch, giving it a broader maximum size than the PGROUP SAE set in this comparison. Check that the drive and socket requirements match your tool; the listed product details do not give an impact rating or tool-specific compatibility information.
DEWALT 20-Piece Deep Socket Set
The DEWALT kit is listed as a 3/8-inch drive, 20-piece deep socket set with SAE and metric sockets. Features include knurled beauty rings to help reduce slipping during hand tightening, DirectTorque Technology, and lockable stacking cases.
Best for: Buyers who want both measurement systems and a case-based storage setup in one kit. Its combined SAE and metric contents may reduce the need to buy separate sets. The supplied product details do not list individual socket sizes or the exact size range, so check the full contents if you need specific sizes.
CRAFTSMAN 3/8-Inch SAE Deep Socket
This is a single 3/8-inch SAE deep socket with a 3/8-inch drive and 6-point opening. CRAFTSMAN lists a full-polish chrome finish for corrosion resistance and large markings for size identification. Its 6-point shape provides contact with the flats of a hex fastener.
Best for: Buyers replacing or adding one specific socket rather than purchasing a full set. It is a straightforward choice when the required fastener is 3/8 inch SAE. Avoid this option if you need multiple sizes, metric coverage, or an included storage rack; those features are not listed.
Buying Guide: How to Choose a 3/8-Inch Deep Socket
Do you need SAE, metric, or both?
Match the socket measurement system to the fasteners you work with. SAE sockets use fractional-inch sizes; metric sockets use millimeters. For jobs involving both systems, the DEWALT kit is listed with SAE and metric sockets, while the MIXPOWER and PGROUP options above are single-system sets.
What does 3/8-inch drive mean?
Drive size describes the square connection between the socket and the ratchet or other compatible tool. It is separate from the socket size, which matches the fastener. Confirm both measurements before buying so the socket fits the tool and the fastener.
Should you choose 6-point or 12-point?
The featured sets are primarily 6-point. A 6-point opening contacts the flats of a hex fastener, a useful consideration when reducing the risk of rounding. A 12-point socket can offer more positions for engaging a fastener, but buyers should compare its shape with the fastener type and task.
When is a deep socket useful?
A deep socket has a longer body than a standard socket and is designed for situations where a fastener or threaded section extends farther from the surface. Check the available clearance around the fastener as well as the socket’s size and drive.
Do you need an impact socket?
Choose a product explicitly identified as an impact socket if that is what your tool requires, and verify its stated rating and tool requirements. Do not assume that a socket is impact-rated based only on its material or appearance.
Frequently Asked Questions
What does 3/8-inch drive mean on a deep socket?
It refers to the size of the square connection that attaches to the ratchet or tool, not the size of the fastener the socket fits.
Are SAE and metric sockets interchangeable?
No. They use different measurement systems, and similarly sized sockets may not fit a fastener correctly. Use the system and exact size specified for the fastener.
Is a 6-point socket better for hex fasteners?
A 6-point socket contacts the flats of a hex fastener. This design can help limit pressure on the corners compared with a less suitable fit, but the socket still needs to be the correct size.
Can I use any deep socket with an impact tool?
No. Confirm that the socket is identified and rated for the intended tool. The word “deep” describes socket length, not impact suitability.