Wera

Wera 8100 SB 2 Zyklop Wrench

Wrench
3.5 ounces
7.9 inches

4.6/ 5 on Amazon642Amazon ratings100+bought last month4.0ProductDome score

Medium confidenceLast refreshed Aug 4, 2026Amazon data + ProductDome analysis · methodology

Best forYou need a short, lightweight ratcheting wrench for tight spaces.

A compact, light Wera ratchet suited to close quarter work, though drive size is not confirmed in the available specs for buyers to check.

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ProductDome scorecard

How it ranks among the 561 wrenches we track

4.0/ 5ProductDome scoreMedium confidence

Owner satisfaction · 56% of scorecategory median 4.7★4.6

4.6★ across 642 Amazon ratings, Bayesian-smoothed toward the category average.

Evidence strength · 17% of scorecategory median 740 ratings3.5

642 Amazon ratings, weighted on a log scale so huge counts don't drown everything.

Buyer demand · 11% of score2.7

100+ bought on Amazon last month.

Data quality · 11% of score2.5

Brand identity, imagery, description and spec coverage.

The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 561 wrenches we track - how the scorecard works · full wrenches data report. Confidence: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.

Overview

The Wera 8100 SB 2 Zyklop is a compact ratcheting wrench measuring about 20 centimeters long and weighing just 100 grams. Its short, light build suits close quarter fastening work.

Wera's Zyklop line is built around a compact ratcheting mechanism, and this SB 2 variant keeps overall length to roughly 8 inches while staying under a quarter pound. The listing does not confirm drive size or socket compatibility, so pairing it with the right accessories is on the buyer.

Model 8100 SB 2 Zyklop
20 cm overall length
100 gram weight
Wera brand ratchet

Who it's for

Mechanics and hobbyists needing a short, light ratchet for tight spaces, not those needing a long handle for extra leverage.

Strengths and trade-offs

Drawn from this product's published specifications.

What stands out

Compact at 20 centimeters long
Very light at 100 grams

What to check first

Drive size not specified in listing
Short length limits leverage on tough fasteners

Performance notes

At 20 centimeters and 100 grams, the 8100 SB 2 favors reach into tight spots over leverage, which matters more on stubborn or high torque fasteners. The Zyklop ratcheting head lets it work in confined areas where a full swing is not possible.

Specifications

Brand	Wera
Item Weight	3.5 ounces
Length	7.9 inches

How it compares

This product against the closest alternatives we track in wrenches.

Product	Amazon rating	Ratings	ProductDome score
Wera 8100 SB 2 Zyklop WrenchThis product	4.6 / 5	642	4.0 / 5
Amazon AMZ1715 WrenchAmazon	4.7 / 5	14,700	4.6 / 5
Wheeler 553556 WrenchWheeler	4.8 / 5	17,300	4.6 / 5
LEXIVON LX-145 WrenchLEXIVON	4.8 / 5	14,700	4.6 / 5
MALCO MSHMLC WrenchMalco	4.8 / 5	14,300	4.6 / 5

Frequently asked

Questions about the Wera wrenches

Common buyer questions answered straight from the product spec data - no fluff, no "it depends".

How long is the Wera 8100 SB 2 Zyklop?

About 20 centimeters.

How much does the Wera 8100 SB 2 Zyklop weigh?

Roughly 100 grams.

Does the listing specify the drive size of the Wera 8100 SB 2?

No, drive size is not included in the available specs.