The beauty of a parallelogram jointer is the four points of contact allowing for easy adjustment of each table for perfect alignment. Plus, parallelogram jointer tables feature arched table travel, keeping each table close to the cutter, adding an additional degree of safety during operation. Setting cut depth is a breeze for traditional jointing or rabbeting with the infeed and outfeed adjustment levers. With the G0857 and G0858 Parallelogram Jointers, you know you're getting a precise, powerful workhorse for your home shop, all with a convenient mobile base built in. CSA certified meeting CAN/CSA C22.2 #71.2-10 and UL 987 standards!