The hardwood wrench™ and the hardwood wrench jr. ™ tools are simple to operate. Start by identifying the. In this article, i will dive. Learn tricks for straightening crooked boards; Making crisp, straight cuts on the board ends; And avoiding problems like hammer. Verkkoour hardwood wrench will straighten deck boards utilizing 1,100 lbs of power. True hands free fastener installations with our orignial locking cam tool.