What this is
QUICK-GRIP is IRWIN’s one-handed bar clamp/spreader line, sold across several force classes. This page covers the Heavy-Duty 12" model (1964712) specifically — the higher-force sibling of the Medium-Duty 1964718 that appears in our trigger clamps comparison. We’re covering it on its own so the full spec sheet for this specific model is in one place.
Full specs
| Spec | Value |
|---|---|
| Model | 1964712 |
| Bar length | 12" |
| Clamping force | Up to 600 lb sustained clamping pressure |
| Throat depth | 92mm (~3-5/8") |
| Bar type | I-Beam bar |
| Jaw type | Dual removable swivel jaws, non-marring full-face pads |
| Mechanism | Patented Power Lock system, Quick-Release trigger |
| Warranty | Lifetime limited warranty (per manufacturer) |
| ASIN | B001V61452 |
Source: IRWIN’s own product page (irwintools.com, model 1964712) for the force rating, throat depth, bar type, and mechanism details. IRWIN’s page doesn’t publish a weight or maximum jaw opening figure for this specific model, so we’re not listing those.
IRWIN QUICK-GRIP Heavy-Duty One-Handed Bar Clamp 12" (1964712)
Manufacturer markets a Quick-Change button that converts this into a spreader, with an adjustable foot for support in spreader mode. This is the Heavy-Duty (600 lb) line — a different model than the Medium-Duty 1964718 (300 lb) covered in our trigger clamps comparison.
View Price on AmazonWho this is for
If you’ve used a 300 lb-class trigger clamp (like the Bessey EHKL12 or IRWIN 1964718 in our comparison) and found it isn’t holding tight enough for the assembly work you’re doing one-handed, this doubles the rated force at the same 12" bar length — same one-handed mechanism, more clamping pressure.
Who this isn’t for
600 lb of trigger-clamp pressure is still light-duty compared to a dedicated bar or parallel clamp rated in the 1,500+ lb range for structural glue-ups — trigger clamps are built for the speed of one-handed assembly work, not for carrying panel glue-up pressure. If that’s your use case, see our parallel clamps comparison instead.
Bottom line
This is a spec-sheet writeup pulled straight from IRWIN’s own listing — we haven’t run our own repeated-cycle wear test on the trigger mechanism. On paper it’s IRWIN’s higher-force one-handed clamp at the same 12" size as their Medium-Duty model. IRWIN QUICK-GRIP Heavy-Duty 1964712 if 300 lb wasn’t enough for your one-handed work.