Known for their strength, Tough Bars are made from European re-forested, kiln-dried and knot-free pine. Tough Bars are finger spliced - a method of bonding pieces of lumber together to form a very long, straight bar - providing a stronger support for your canvas.
Each bar's profile has a 1/3" rise to prevent sagging and each bar is slightly rounded at the top edge, which is ideal for accommodating various canvas and linen weights. These heavy duty stretchers feature a strong tongue and groove design. SPI Bracing is available to match SPI Tough Bar sizes.