These adjustable heavy-duty tongs are perfect for carrying concrete wall units around the job site. Each end provides a secure hold to concrete, speeding up work and reducing the workload all at once. The spacing is 12 inch to 17 inch. These tongs are made of tubular steel for light weight and durability. If you have a lot of concrete wall unit blocks to move, it is likely better to have two of these tongs to balance out the weight. Bon Tool's products have been trusted by professionals for over 60-years. Bon is committed to the development and improvement of tools for professional contractors and do-it-yourselfers alike. We put our trusted name to every product we sell.