Best Metric Socket Set (2026): 5 Picks Compared

Compare the picks

Specifications are manufacturer rated, as published on each listing and collected 21 October 2026. The Klein set includes both SAE and metric sockets; the other four are metric.

How we scored them

All five sets are scored on performance, build, value, safety and warranty, using only what each listing publishes. Ratchet innovation, size range and stated standards separate the top two from the rest.

Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.

What the listings tell you

The Klein KNECT is the odd one here: it includes 18 SAE and metric hex sockets, so it is not a pure metric set, but its 90-tooth pass-through ratchet is the finest gearing in the group. The boen listing states its sockets meet ANSI standards and can reach 1.3 times the ANSI torque standard in its own experiment, the only standards claim here. The Klein warranty line reads “call vendor for warranty”, which is not a stated term, so no warranty is counted. The Wera, YIYITOOLS, boen and SEDY listings state no warranty term either.

Buying guide: the best metric socket set

Drive size decides the work

The boen and YIYITOOLS are 1/2-inch drive, the heavy-torque choice for lug nuts and suspension bolts. The Wera and Klein are 3/8-inch drive, the all-rounder size for engine bays and general auto work. The SEDY is 1/4-inch drive, for small fasteners, trim and machine work. The boen kit includes a 3/8 to 1/2 inch adapter, so a 3/8 ratchet can drive its sockets. See our 1/4 vs 3/8 socket set comparison for more on drive sizes.

Ratchet tooth count and swing

More teeth mean a smaller swing arc in tight spaces. The Klein states 90 teeth, the finest here, on a pass-through head with a slim profile for extended bolts and threaded rod. The Wera states 72 teeth with a 5-degree return angle, plus a free-turning sleeve and flywheel design for fast screwdriving. The SEDY’s quick-release ratchet has no tooth count stated. The boen and YIYITOOLS are socket-only sets with no ratchet included, so pair them with your own.

Size range and depth

The boen spans 9-32mm in deep and shallow, the widest range here, with 3, 5 and 10 inch extension bars and an impact universal joint. The YIYITOOLS spans 8-24mm in shallow only. The SEDY spans 4-15mm in deep and shallow plus magnetic nut drivers. The Wera’s 43 pieces center on its ratchet system with ball-lock sockets. Deep sockets reach recessed fasteners; shallow sockets fit tight clearances. Match the range to the vehicles you own.

Build and markings

All five use chrome vanadium steel. The boen adds a black manganese phosphate coating for corrosion resistance, and the SEDY a black phosphate coating with an electrophoresed surface. The Wera uses alloy steel with a brushed finish and a Take It Easy color-coded sizing system on its metal case. The YIYITOOLS and SEDY use laser-etched markings for size identification; the boen adds laser marking to stamped markings. The Klein stores everything in a MODbox case.

Warranty

None of the five listings states a warranty term. The Klein listing says “call vendor for warranty”, which is not a stated term, so no warranty is counted for any of them.

Six-point sockets and fastener grip

The YIYITOOLS and boen sets state 6-point sockets. A 6-point socket contacts the flat sides of a hex fastener rather than the corners, which spreads the load and lowers the chance of rounding a stubborn bolt. The YIYITOOLS listing calls this an anti-round-off design that allows maximum torque with confidence. The boen listing states its sockets can reach 1.3 times the ANSI torque standard in its own experiment. If your work includes rusted or over-torqued fasteners, a 6-point set is the safer choice over 12-point.

Impact-rated or hand use only

Not every socket here is meant for an impact wrench. The YIYITOOLS set is a shallow impact set, the boen is built for impact tools with heat-treated forged steel, and the Klein’s pass-through sockets, adapters and bits are all impact-rated. The Wera and SEDY listings state no impact rating. Running a non-impact socket on an impact gun risks cracking it, so match the set to your tools: impact-rated for the impact wrench, hand-rated for the ratchet.

Keeping the set together

A socket set that scatters across the toolbox is a set you stop using. The Wera rides in a rugged metal case with a Take It Easy color-coded sizing system, so the right size is visible at a glance. The Klein stores everything in a MODbox case. The YIYITOOLS comes in a sturdy high-impact storage case, the boen in a portable case, and the SEDY as a storage kit. Cases with molded slots also protect the laser markings, which are how you identify sizes in dim light on the YIYITOOLS, SEDY and boen sets.

Adapters and extensions

The accessories decide how far a set reaches. The boen includes 3, 5 and 10 inch extension bars, an impact universal joint and a 3/8 to 1/2 inch adapter, so one kit covers deep wells and mixed drives. The Klein includes 4 adapters that let every component run on a 1/4-inch impact driver. The SEDY includes an extension bar, a universal joint and a bit coupler. The YIYITOOLS and Wera list no extensions or adapters. If you already own a good ratchet, an accessory-rich socket-only set like the boen stretches further.

Frequently Asked Questions

Which set is pure metric?

The Wera, YIYITOOLS, boen and SEDY are metric. The Klein includes both SAE and metric sockets.

Which ratchet has the finest gearing?

The Klein with 90 teeth, followed by the Wera with 72 teeth and a 5-degree return angle.

Which set covers the widest size range?

The boen, 9-32mm in deep and shallow, with extension bars and a universal joint.

Which of these states a warranty?

None. The Klein says “call vendor for warranty”, which is not a stated term.

Which set meets a stated standard?

The boen, which states its sockets meet ANSI standards.

Related: the best socket set for beginners, the best socket set for truck owners and our combination wrench vs socket set comparison.