The Milwaukee M12 Cordless 23-Gauge Pin Nailer 2.5Ah Kit with Grex P6 23-Gauge Galvanized Pin Nail Multi Pack, 3/8" to 1-3/8", 3000 Pack is a ready-to-run finish fastening bundle for trim carpenters, cabinet installers and remodelers. This is a 23-gauge pin nailer designed for fastening delicate trim, small moldings and cabinet details with nearly invisible holes. Model Number 2540-20-Pins-Battery combines the Milwaukee 2540-20 M12 23-Gauge Pin Nailer, a Milwaukee 48-11-2425 M12 REDLITHIUM HIGH OUTPUT CP2.5 battery and a Grex P6 23-gauge pin nail multi pack.

The 2540-20 uses a nitrogen air spring to drive 23-gauge headless pins from 1/2" to 1-3/8". Milwaukee rates it for consistent, clean pin holes and enough power to sink pins in hardwoods. That is the combination finish work needs: pins that seat flush in oak and maple trim without blowing out thin stock, and holes small enough to disappear under a dab of filler or finish.

Control features are built for finish surfaces. A double-action trigger supports sequential placement, tool-free depth adjustment dials in the set for each material, and two interchangeable non-marring precision tips protect stained or painted trim. The dry-fire lockout stops the tool from firing on an empty magazine and marking the work, a reload indicator warns you before the 120-pin magazine runs out, and an LED lights shadowed corners and cabinet interiors. At 8.7" long and 7.7" tall, it fits where larger Milwaukee nailers get awkward.

The battery in this kit is a step up from a standard compact pack. Milwaukee rates the HIGH OUTPUT CP2.5 at 25% more power and 25% cooler running than other M12 REDLITHIUM compact batteries, giving you the output of an XC pack in a lighter, smaller package. Its housing resists the oils, greases and solvents common in shop and maintenance environments, and it delivers fade-free power in cold weather below 0°F (-18°C). REDLINK intelligence manages communication between tool, battery and charger for overload protection.

The Grex assortment covers the pin lengths you reach for most: 500 each of 3/8", 1/2", 5/8", 3/4", 1" and 1-3/8", for 3,000 galvanized headless pins. The 1/2" through 1-3/8" lengths run in the 2540-20. That spread lets you test lengths on scrap and match the pin to the stock before buying full boxes of any single size.

Everything here runs on the Milwaukee M12 system, so the battery also powers any other M12 tool you own. A charger is not part of this bundle; if you are new to M12, add one before the first job.

Who should buy it? Trim and finish carpenters, cabinet and millwork installers, remodelers and serious woodworkers who want a dedicated cordless pinner with the battery and fasteners already sorted. If you need holding power for heavy casing or baseboard, a brad or finish nailer is the better tool; this one is for clean, low-visibility pinning.

The Milwaukee M12 Cordless 23-Gauge Pin Nailer 2.5Ah Kit with Grex P6 Pins Is Ready for Trim Day

A compact cordless pinner, a stronger-than-standard compact battery and 3,000 pins in one order.

• Who it's for: Trim carpenters, cabinet installers and remodelers who want to stop dragging a hose for small moldings and details.
• Why it stands out: Clean holes, power for hardwoods, tool-free depth, dry-fire lockout and a HIGH OUTPUT CP2.5 pack.
• Worth knowing: The 2540-20 is rated for 1/2" to 1-3/8" pins, so the 3/8" pins in the assortment are for other pinners. No charger is included.

• Does this kit include a charger? No. It includes the nailer, one CP2.5 battery and the Grex pin assortment.
• What pins does the nailer take? 23-gauge headless pins from 1/2" to 1-3/8".
• Does it need a hose or gas cartridge? No. It is fully cordless and runs on M12 batteries.