https://www.mccoys.com/shop/p/02120505/bear-clip-100-hardie-siding
The Bear Clip™ is a revolutionary new way to install fiber cement lap board siding. With the Bear Clip™ System one person can safely & effectively install fiber cement lap board siding. The Bear Clip™ is designed to hold each fiber cement lap board level with the first, forming the perfect overlap while being fastened in place. As long as the first board is hung level, the Bear Clip™ helps to ensure that each row after is level.