These All Wood, kiln-dried solid pine stretcher bars combine Rigid Support at an Economical price! The stretcher bars feature the traditional tongue and groove corner ends that you can quickly assemble by interlocking two strips to form a Canvas corner. They also feature a uniform beaded edge, so the Canvas is slightly offset, to ensure that there will be no "ghost" impressions on the Canvas. The profile measures 1-1/2" wide by 1-1/2" deep. Unlike other stretcher bar systems, these create an ideal flush frame that is sturdy. Gallery Pro Medium Duty Stretcher Bars are the perfect solution for custom Sized Canvases!