The PETZL Attache Carabiner with SCREW-LOCK is actually pretty well-regarded among climbers for being reliable and easy to use.

It's made from lightweight aluminum and fits nicely into a variety of climbing activities, from sports climbing to belaying. The manufacturer describes it as strong but compact, which makes it easy to handle when you're out there climbing.

Now, if you're worried about it getting stuck or jammed, our research shows that the SCREW-LOCK mechanism is generally smooth.

There's a neat little visual indicator that lets you know when the gate is locked, which is pretty comforting when you're scaling a wall. This design helps avoid accidentally opening the gate, which is crucial.

The carabiner also has an H-shaped cross-section which cuts down on weight and makes it easier to handle — really useful if you're wearing gloves.

Of course, how well it performs can depend on a few things like dirt, moisture, or just regular wear and tear.

It's a good idea to keep it clean and inspect it regularly to avoid any issues. If you're going into particularly rough conditions, keeping this in mind is even more important.

In general, with a bit of maintenance, the PETZL Attache Carabiner SCREW-LOCK shouldn't get stuck or jam.

It seems to be a reliable choice for those who want a mix of safety and ease of use, at least according to our research. It might be a good addition to your climbing gear if you're looking for something trustworthy.