Stretcher bar

They are also used for small-scale embroidery to provide steady tension, affixing the edges of the fabric with push-pins or a staple gun before beginning to sew, and then removing it from the stretcher when the work is complete.

Commercially available pre-fabricated stretchers come in segments with interlocking corners, that can be fit together like puzzle pieces.

There are also many big regional differences in the style and cutting of the wood, due to the historical reasons.

But most stretchers, to avoid warping is made in well dried Nordic pinewood sourced from Scandinavia, Russia, and Canada.

Stretcher bars are used extensively in theatrical productions for framing material backdrops.

When a photographer takes a picture then digitally transfers this onto a canvas via inkjet printing, he then stretches this over a stretcher frame.