LEXIVON LX-121 5/8-Inch Swivel Magnetic Spark Plug Socket, 3/8-Inch Drive

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Product guide

LEXIVON LX-121 5/8-Inch Swivel Magnetic Spark Plug Socket, 3/8-Inch Drive

The LEXIVON LX-121 is a 5/8-inch swivel magnetic spark plug socket with a 3/8-inch drive and a listed 6-inch length. Its swivel joint and magnetic core are intended to help with plug handling in confined spaces, but the socket size still needs to match your vehicle's spark plugs.

At a glance

Magnetic core is intended to retain the spark plug during removal and installation.
Swivel joint is designed to angle the socket into tighter access areas.
Thin-wall profile and 6-inch listed length suit work in plug wells where reach and clearance matter.
Knurled shaft is described as a grip aid, and the size is laser-etched for identification.

Price

$11.97Save 14%

Reference price: ~~$13.97~~

Price checked: Nov 12, 2026

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Pros and cons

Pros

Combines a swivel joint with a magnetic core to aid access and plug retention.
3/8-inch drive is specified for use with compatible drive tools.
The listing identifies a thin-wall design and 6-inch length for reach into plug wells.

Cons

A single 5/8-inch socket does not cover other spark plug sizes.

Technical specifications

14 specifications

Identity
Brand	LEXIVON
Model	LX-121

Socket and construction
Socket size	5/8"
Drive size	3/8"
Length	6 inches
Wall design	Thin wall
Core material	Alloy Steel
Finish	Chrome plated mirror finish
Swivel action	360-degree action
Thread size	16mm
Vehicle service type	Car, motorcycle

Dimensions and installation
Weight listed	19 g

Warranty and standards
Warranty description	Lifetime Limited Warranty
Standards claim	Meet & Exceeds ANSI

What to know before buying

Listing details to confirm

Confirm that your vehicle uses 5/8-inch spark plugs and that a 3/8-inch drive is suitable for your tool. The listing separately gives a 16mm thread size, so verify fit against your application rather than treating these size descriptions as interchangeable. Its claims of hardened Chrome Vanadium alloy steel, while the details field lists Alloy Steel, are inconsistent, and the supplied detail does not confirm a precise steel grade. The stated ANSI compliance and lifetime limited warranty are manufacturer claims. Check the warranty terms.

What’s in the box

Included

5/8" Swivel Magnetic Spark Plug Socket

Who is it for?

A good fit for

DIY vehicle owners changing compatible 5/8-inch spark plugs.
Mechanics who need a swivel socket for angled access and magnetic plug retention.
Buyers seeking an individual 3/8-inch-drive spark plug socket rather than a size assortment.

Less suited to

Anyone whose application requires a spark plug socket size other than 5/8 inch.
Buyers looking for a multi-size set or a separate extension bar.

LEXIVON LX-121 5/8-Inch Swivel Magnetic Spark Plug Socket, 3/8-Inch Drive · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 20,134 ratings

5 stars85%85%
4 stars10%10%
3 stars3%3%
2 stars0%0%
1 star2%2%

Customer feedback highlights ease of changing plugs, magnetic retention, swivel access in tight spots and fit with many common 5/8-inch applications. These experiences align with the listed magnetic core and swivel design, though vehicle fit still depends on plug size and access. Durability feedback is mixed, including reports of the magnetic ring breaking, so buyers should not treat the longevity claims as a guarantee of how the socket will hold up.

Positive themes

Customers describe the socket as easy to use for spark plug changes.
Feedback praises magnetic plug retention and the swivel for tight access.
Customers report good fit in many vehicles using common 5/8-inch plugs.

Mixed feedback

Durability feedback is mixed, with some reporting lasting use and others describing the magnetic ring breaking.

Frequently asked questions

What spark plug size does the LEXIVON LX-121 fit?

The product title identifies it as a 5/8-inch spark plug socket. Confirm your vehicle's plug size before buying. The listing also gives a 16mm thread size, which should be checked against your application.

What drive size does it use?

The listed drive size is 3/8 inch, so it is intended for compatible 3/8-inch-drive tools.

Does the socket have a swivel and magnetic core?

Yes. The listing describes a 360-degree swivel action and a magnetic core intended to retain the plug during handling.

What is included?

The listed included component is one 5/8-inch swivel magnetic spark plug socket.

What warranty is listed?

The listing states a Lifetime Limited Warranty. Review the manufacturer's warranty terms for coverage details.