Shopsmith Wood Bars for Double Bar Clamps feature a unique, CNC-cut radius that allows the bars to exert even pressure along the entire length of the panel for tight, even glue joints every time. The 48 Inch version of the bars has a minimum workpiece width of 22 Inches. Purchase the 48 Inch Double Bar Clamp & Hardware Pack Bundle (514606) for the complete system. These bars make one clamp, multiple clamps are recommended for best results.