CRAFTSMAN CMMT87220 20-Piece Ratcheting Wrench Set, SAE and Metric

For automotive repairs or household projects with fasteners in different sizes, the CRAFTSMAN CMMT87220 puts SAE and metric ratcheting combination wrenches in one set. Its 90-tooth box ends use a 4-degree arc swing, a practical fit for working where wrench movement is limited. Need to switch between measurement standards on the same job? The set includes ten wrenches for each.

Highlights

The 20-piece set covers SAE sizes from 1/4" to 3/4" and metric sizes from 6mm to 18mm. Each wrench combines an open end with a 12-point ratcheting box end, so you can choose the end that suits the fastener and access available. The 90-tooth mechanism engages with a 4-degree arc swing, helping when nearby parts leave little room to move the wrench through a full turn. Large markings make it easier to identify the size you need, while the polished chrome finish is designed for corrosion resistance. A case keeps the set together between jobs.

Buyers often highlight the smooth ratcheting action, durable feel, polished appearance, and usefulness of the carrying case. Feedback on adjustability is mixed, so it is worth distinguishing that observation from the set’s documented features: these are fixed ratcheting combination wrenches. CRAFTSMAN also states that the wrenches meet or exceed ASME specifications and includes a full lifetime warranty.

Tips for day-to-day use

Keep the wrenches together in their case so both SAE and metric sizes are available when moving between tasks. The large size markings support quick selection, and the two measurement systems make the set useful for work involving a mix of standard and metric fasteners. For a project that calls for only one size, an individual wrench may be a more focused purchase, this set suits someone who wants a range of sizes and both standards together.

How to use it

Select the size that matches the fastener, then use the open end or the 12-point ratcheting box end as access allows. Where a full wrench swing is difficult, the fine-tooth ratcheting mechanism works with a 4-degree arc swing, reducing the movement needed between engagements. The 12-point box end is designed for quick engagement with the fastener. Once the task is complete, return each wrench to the case to keep the collection together for the next repair or maintenance job.

Before you decide

Which sizes are included? The SAE sizes are 1/4", 5/16", 11/32", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", and 3/4". The metric sizes are 6mm, 8mm, 10mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, and 18mm.

What does the 4-degree arc swing mean in use? It describes the small movement needed for the ratcheting box end to engage again, which is useful when surrounding space restricts how far you can move a wrench.

How can I identify the size quickly? The wrenches have large markings intended to make size identification easier.

Is it worth it?

This set is suited to a home mechanic or hands-on household user who wants a broad selection of ratcheting combination wrenches in both SAE and metric sizes. The 90-tooth, 4-degree swing design addresses restricted working space, while the open ends, marked sizes, and storage case make the collection practical to select and keep together across repair and maintenance tasks.