Hand Tools / SELECTION GUIDE
How to Choose a Socket and Bit Set
Decide whether you need a ratchet-containing kit, compatible accessories or just a few missing sockets.

Choose the tool connection and the missing sizes before the piece count. A ratchet-containing kit, an accessory set and two individual sockets solve different buying problems.
Start with your missing tools
Write down the job and the fasteners it involves before opening a kit comparison. The useful starting point is the equipment’s instructions and the tools already on your bench. A case of accessories can be a sensible addition when you own a suitable handle; it leaves a gap when you still need the tool that turns them.
Make three short lists: fastener openings or bit tips you need, connections on tools you own, and access restrictions around the work. Compare sets against those lists. A general mechanic set is not automatically a complete vehicle-service toolkit, and a small accessory case is not necessarily an incomplete purchase.
Separate the drive from the working end
The drive connects the socket to the handle. The socket opening fits the nut or bolt head. CRAFTSMAN’s CMMT44426 3/8-inch-drive, 10 mm socket illustrates that these are separate dimensions; an inch-designated drive can have a metric opening. This example does not identify the dimensions of any Hardwick kit.
| Specification | Question it answers | Record separately |
|---|---|---|
| Drive connection | Will this socket connect to my ratchet? | Square-drive size |
| Socket opening | Will the working end fit the fastener? | Metric or fractional-inch opening and profile |
| Bit connection | Will this bit mount in my holder? | Shank type and size |
| Bit tip | Will the working end engage the screw? | Profile and tip size |
Hand ratchet → matching square-drive socket → nut or bolt head
Compatible bit holder → matching bit shank → screw recess
A conceptual reading aid, not a dimensioned drawing or a description of a supplied kit.
Compare useful coverage rather than totals
A total can combine sockets, bits, handles, extensions and adapters. Manufacturer contents lists, such as CRAFTSMAN’s, separate these groups. Rebuild the candidate’s list in the same way: which pieces add a new fastener size, which add access, and which connect tools you need?
For example, suppose you own a suitable 3/8-inch-drive hand ratchet and your hypothetical job needs 10 mm and 13 mm sockets. A kit with many screw bits but neither required socket leaves the original problem unsolved. Two correctly specified sockets may be a better purchase than another large case. This is a shopping example, not a fit claim for a listed set.
Shallow and deep sockets with the same opening add different access options rather than different fastener sizes. Check body clearance, internal depth and room for the handle when the work is recessed or obstructed. For powered use, verify the intended use of every tool and accessory; an adapter that physically fits is not an impact approval.
Read the selected configuration before ordering
Compare the mechanic tool set collection by exact configuration. The manual mechanic tool sets page contains several choices; a case photo is not a contents list for every option. Expand the option and check the SKU, description and corresponding image.
If a required detail is absent, send a focused question: “For this selected SKU, does the set include 10 mm and 13 mm sockets in the required profile? What are the drive size, socket lengths and complete contents? Is the intended use hand-operated or powered?” Add the restrictions from your real job instead of using the example sizes blindly.
Choose the set that completes the connection and fills the missing coverage. Keep the product option or SKU with your comparison so that a later price or image change does not make you compare different bundles.
Sources and further reading
These manufacturer references explain terminology and selection checks. They do not establish that Hardwick products share another manufacturer’s specifications, approvals or compatibility.

