Craftsman

CRAFTSMAN CMMT12121 Wrench

Wrench
17 inches

4.8/ 5 on Amazon782Amazon ratings3.8ProductDome score

Better rated than 72%

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

Best forYour fastener needs more leverage than a standard-length wrench provides.

Worth choosing if you specifically need Craftsman's extra 17 inch reach for leverage, though the listing leaves drive size and jaw type unconfirmed.

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ProductDome scorecard

How it ranks among the 561 wrenches we track

3.8/ 5ProductDome scoreMedium confidence

Owner satisfaction · 56% of scorecategory median 4.7★4.8

4.8★ across 782 Amazon ratings, Bayesian-smoothed toward the category average.

Evidence strength · 17% of scorecategory median 740 ratings3.6

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

Buyer demand · 11% of score0.0

Modest tracked demand 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 Craftsman CMMT12121 is a 17 inch wrench, longer than typical hand wrenches, built for extra leverage on stubborn fasteners. Beyond length, the listing does not specify drive size, jaw type or finish.

Length is the standout number here, and it is worth taking at face value rather than assuming a specific jaw or drive configuration the listing never states. Check that spec against your fastener before ordering.

17 inch overall length
Craftsman branded
4.8 star rating
782 ratings on record

Who it's for

Suits anyone working large or seized fasteners who needs more leverage than a standard wrench provides. Not suited to tight engine bays or confined spaces where a 17 inch tool can't swing freely.

Strengths and trade-offs

Drawn from this product's published specifications.

What stands out

17 inch length gives extra leverage
Craftsman brand reliability
4.8 rating across 782 reviews

What to check first

Listing omits drive size, jaw type or finish
Length makes it unsuitable for tight spaces

Performance notes

Length is the main lever here: at 17 inches the tool trades compactness for torque, helping break loose fasteners that resist shorter wrenches. The listing stops short of naming jaw type or drive size, so matching it to your exact fastener is on the buyer.

Specifications

Brand	Craftsman
Model	CMMT12121
Length	17 inches

How it compares

This product against the closest alternatives we track in wrenches.

Product	Amazon rating	Ratings	ProductDome score
CRAFTSMAN CMMT12121 WrenchThis product	4.8 / 5	782	3.8 / 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 Craftsman CMMT12121

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

How long is the Craftsman CMMT12121 wrench?

17 inches.

What rating does the Craftsman CMMT12121 hold?

4.8 stars across 782 ratings.

Does the Craftsman CMMT12121 work in tight spaces?

Its 17 inch length is built for leverage rather than maneuvering in cramped clearances.