CMI Throw Line Cube

The CMI throw line cube is a collapsible fabric container that stands open on the ground so you can stuff throw line in and throw again without tangles. It folds flat for storage, which helps when gear space on the truck is tight.

Faster line setting

Setting a climbing line usually takes more than one throw. With a cube, the line goes straight back into the box after a miss, and the next throw pays out from the top without the snarls you get from a pile on the grass. That saves real time on a tall tree with a tight target crotch.

Stuff the line in loosely rather than coiling it, and keep the end tied off or clipped to the cube so you do not throw the whole line into the tree. See other options in gear storage.

Brightly colored throw line is easier to spot in a cube and in the canopy, and keeping the weight bag on top helps the line pay out in order.

Living with it on the job

Set the cube on level ground clear of brush and sticks that can snag the line as it pays out. When the job is done, stuff the line back in with the weight on top, fold the cube down and keep it with the climbing kit so the next setup starts clean.

Keep throw line out of saw fuel and bar oil, and wash out grit and leaves now and then. Dirty line is harder to throw and wears faster.

If you work in wet weather, let the cube and line dry out before packing them away for long. Damp line packed tight in a closed bin can stay wet for days and pick up mildew, and a soggy cube does not stand up as well on the next job.