CRAFTSMAN CMMT12123 105-Piece Mechanics Tool Set

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Product guide

CRAFTSMAN CMMT12123 105-Piece Mechanics Tool Set

The CRAFTSMAN CMMT12123 Mechanics Tool Set combines 1/4-inch and 3/8-inch drive tools in a 105-piece SAE and metric kit. Its listed low-profile, 72-tooth ratchets are intended to help reach confined spaces, while the molded case keeps the assortment together.

At a glance

The listing describes a 105-piece collection of 6-point sockets and drive tools in SAE and metric sizes.
The 1/4-inch and 3/8-inch ratchets are described as low-profile, with a 72-tooth mechanism and 5-degree arc swing.
A molded case with metal hinges is specified for storage. The description says it is designed to fit CRAFTSMAN metal storage boxes.
The listing positions the set as either a starter kit or an addition to an existing tool collection.

Price

$66.47Save 39%

Reference price: ~~$109.00~~

Price checked: Nov 14, 2026

View offer Ahead of Black FridayExplore the selection

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Pros and cons

Pros

Both SAE and metric sizing are represented in one set.
Two drive sizes and a 5-degree ratchet swing are useful when working in tighter spaces, according to the listing.
The included case provides a dedicated place to keep the set together.

Cons

This is a hand-tool set with 1/4-inch and 3/8-inch drives. Buyers needing other drive sizes or a broader tool assortment may need additional tools.

Technical specifications

16 specifications

Identity
Brand	CRAFTSMAN
Model	CMMT12123
Number of pieces	105
Drive sizes	1/4-in. and 3/8-in.
Socket style	6-point
Measurement systems	Standard (SAE) and Metric

Materials and finish
Material listed	Chrome Vanadium Steel
Finish	Polished
Corrosion-resistance claim	Full Polish Chrome Finish

Ratchets and storage
Ratchet tooth count	72-tooth
Ratchet arc swing	5 degree arc swing
Low-profile head comparison	Up to 25% thinner head* for access in tight spaces (as compared to CMMT81747 & CMMT81748)
Case	Durable Blow Molded Case
Case hinges	metal hinges

Coverage and warranty
Listed assortment	sockets, ratchets, and specialty bits
Warranty claim	Full Lifetime Warranty

What to know before buying

The claimed thinner ratchet-head comparison is specifically against CMMT81747 and CMMT81748. The product description calls the assortment broad but does not provide individual socket sizes or a complete contents breakdown, so check the selected listing if particular sizes or bits are essential.

What’s in the box

Molded storage caseCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Automotive hobbyists seeking a compact SAE and metric socket-and-ratchet starter set.
Mechanics who want a portable case for a set organized around 1/4-inch and 3/8-inch drives.
Tool owners adding a small assortment of sockets, ratchets and specialty bits to a larger collection.

Less suited to

Buyers who need confirmed individual socket sizes before purchase.
Anyone seeking a general-purpose household tool kit or a set with drive sizes beyond the listed 1/4-inch and 3/8-inch.

CRAFTSMAN CMMT12123 105-Piece Mechanics Tool Set · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 339 ratings

5 stars83%83%
4 stars9%9%
3 stars3%3%
2 stars4%4%
1 star1%1%

Customer feedback highlights perceived quality and craftsmanship, a useful assortment of sockets, and a case that helps keep pieces together. Some feedback appreciates the set's functionality and portability, including for weekend mechanics. Ease of use receives mixed feedback. In context, the listed 105-piece SAE and metric assortment with two drive sizes suits compact automotive tasks, but the positive impressions do not establish whether its unspecified socket sizes match a particular job.

Positive themes

Customer feedback describes the set as well made and appreciates its essential socket assortment and storage case.
Feedback also mentions functionality and portability for weekend mechanical work.

Mixed feedback

Ease of use receives mixed feedback.

Frequently asked questions

Does the CMMT12123 include both SAE and metric tools?

Yes. The listing identifies the set as Standard (SAE) and Metric. It does not provide a complete breakdown of the included sizes.

What drive sizes are listed?

The product description specifies 1/4-inch and 3/8-inch drives. It does not claim additional drive sizes.

What is the ratchet swing specification?

The listed 72-tooth ratchets have a 5-degree arc swing. The description also claims a low-profile head up to 25% thinner than two named CRAFTSMAN models.

Is a case included?

The title and product description claim a durable molded case with metal hinges. Check the selected listing for the specific package details.

What warranty is stated?

The feature listing says Full Lifetime Warranty. Review the applicable warranty terms for coverage and conditions.