THIS TOOL IS EASY TO MAKE IT CONSISTS OF A 5-1/2 INCH AND A 4 INCH LENGTHS OF THREADED ROD WITH 2 WASHERS AND 2 NUTS PER ROD ARE INSERTED INTO 1/2 INCH HOLES DRILLED IN EACH 2” X 2” X 4” BLOCK OF WOOD, ADJUSTER IS SET BETWEEN THE PULLEYS AND NUTS ARE ADJUSTED OUTWARD UNTIL THE DESIRED POUNDS OF TENSION FOR THE V-BELT ARE MET. The adjuster when in use should be centered more than is shown in the picture, as it was just set in there for display purposes. The holes are offset so the block of wood can be turned to align with the pulley that are being adjusted.