P645L - 23 Gauge 1 3/4" Length Pinner w/ Lock-out

Now you have the ability to drive longer fasteners and prevent dry-firing with the same great quality and features expected from GREX. First of our "Lock-Out" series, the GREX P645L is an upgrade to the P645 headless pinner. Adding an "L" (Auto Lock-Out) to the GREX P645L means: Less rework, less down time, and less tool and project damage.

We added the Auto Lock-Out for those difficult, more critical jobs such as overhead crown molding. The Auto Lock-Out locks the GREX P645L to prevent dry-firing; locking the pinner with approximately 6-8 pins remaining in the magazine. Dry-firing can causes tool damage and might cause damage to an expensive project. The Auto Lock-Out over-ride button allows use of the remaining pins to tack a project-piece in place freeing the operator to reload.

Of course, the GREX P645L 23-gauge headless pinner features the original patented self-adjusting magazine design eliminating the need to manually adjust for each different fastener length. This model drives fasteners ranging from 1/2” to 1 3/4”; a total of 12 different lengths.

The high tolerance precision machined hardened steel driver, Posit-Lock™ nose cover and nose guide assembly aligns and seats the headless pin for optimal drive performance. What is Posit-Lock™ - it's tight tolerance, durability and functionality that reduces jams to a minimum.

The P6 Series comes in seven different designs: P630, P635, P645, P645L, P650, P650L and the P650LXE.

GREX, demanded by Pros, for more than 20 years has helped professionals rise to the top of their trade. Now explore.


- Seven different designs: P630, P635, P645, P645L, P650, P650L, P650LXE

- Auto Lock-Out feature prevents dry-firing

- Auto Lock-Out over-ride button allows use of the remaining pins

- Drive twelve different length fasteners from 1/2” to 1 3/4”

- Lightweight aluminum body designed for mobility and all day continuous use

- Precision machined and aluminum cylinder, piston valve, and firing valve

- Powerful motor to drive fasteners through hardwood

- Patented magazine self-adjusts for different fastener lengths

- Double trigger safety lock prevents accidental firing of tool

- The Posit-Lock™ nose cover for tight tolerance and access to the pin chamber

- Narrow nose design reaches corners and tight areas for detail work

- No-mar rubber tip prevents marring of work surface

- No-mar guidelines for accurate pinning

- Rear magazine cap with hex wrench and spare no-mar tip storage

- Fastener indicator window shows fastener supply

- Swivel air coupler helps keep air hose tangle-free

- Drop-in fastener loading for quick and easy reloading

- Belt hook keeps your GREX tool at your side; left or right mounted

- Rear exhaust with silencer reduces noise and directs exhaust air away

- Rubber handgrip for a firm comfortable grip


Dimensions: 8.75"H x 7.75"L x 1.5"W (22.2 x 19.7 x 3.8 cm)

Weight: 2.68 lbs. (1.2 kgs.)

Operating Pressure: 60 ~ 110 psi (4 ~ 7.6 bars)

Fastener Type:23 Gauge Headless Pins

Fastener Range: 1/2" ~ 1 3/4" (12mm ~ 45mm) excluding 1 1/4" (32mm)

Fastener Capacity: 1 strip (approx. 100 pins)

Air Inlet: 1/4" (6mm) NPT male plug


Overhead applications, Light wood assembly, Finish and trim work, Molding and decorative trim, Dowel and joint pinning, Mirror and picture frame assembly, Lightweight panelling, External softwood trim, Rattan furniture, Glazing strips, Craft work, Window beading, Display and sign work, Etc...

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