Irwin Quick Grip Clamp Repair
I thought I had broken one of my Irwin Quick Grip clamps when the handle pulled out of the clamp body. It looked worse than it was.
The fix was simple: remove the plastic side covers, slide the handle back into place, and snap the covers back on. The side plates are what keep the handle captured.
What Happened

I store some of my clamps under the workbench, clamped to the 1 x 4 support for the workbench drawers. When I tried to pull one out, the only thing that came with me was the handle.
At first glance, I assumed something had snapped inside the clamp. Before throwing it away, I wanted to open it up and see whether it was actually broken.
Opening The Clamp

When something is already broken, my first thought is usually that I cannot make it much worse. I popped off the plastic side cover to look for a sheared pin or broken internal part.
It turned out there was no pin holding the handle in place. The handle slides in and out fairly easily once the side cover is off.
Reseating The Handle

With both side covers removed, the handle slides back into position with light thumb pressure. Once the handle is seated, the plastic side covers snap back on and hold everything together.
The side plates are what keep the handle from pulling out during normal use. Those side plates are held by plastic alignment pins, so take your time when removing or reinstalling them.
Repair Takeaway
This Irwin Quick Grip clamp repair took only a few minutes once I understood how the handle was captured. If the handle pulls loose and nothing is visibly cracked, do not assume the clamp is ruined. Check the side covers, reseat the handle, and snap the covers back into place.
It is a small repair, but it saved a useful clamp from the trash.