The Best Pro-Bar System prevents bending and warping resulting from humidity and dryness. The combination of the finest kiln-dried wood and specially milled aluminum create a strong and rigid support. Ideal for large scale painting.
Best Pro-Bar Metal Corner Keys Kit - Best Corner Keys allow tightening or loosening of the canvas with the turn of a nut. Each kit contains a set of four keys which can be mounted by using the pre-drilled holes on the Aluminum Pro-Bars or by making your own with a 3/32" drill bit. Keys are optional, but highly recommended. Sold in packs of 4.