The construction industry is responsible for the design of the heavy duty BEST Rapid Canvas Stretching Stapler. For those artists that prefer to stretch their own canvases, they know they need the right tools in order to make their creative time productive. By using the right tools, artists can help make their canvas stretching experience one that is strain and frustration free. Ergonomically designed so that the artist is using the right form while stretching their canvas, this tool works well with BEST stretcher bars. This stretching stapler takes BEST Rapid Staples in the 5/16" (8mm) x 3/8" (10.6mm) size.