Nate R. of Grain Valley, MO is the creator of the Simple Crossover, a support system for streamlining the installation of concrete masonry units over an opening like a window or door. The device ...

The system, overall, prevents masonry materials from being wasted by ensuring the block is laid properly. It also creates a stronger and safer means of crossing over a masonry opening during ...

Nate R. of Grain Valley, MO is the creator of the Simple Crossover, a support system for streamlining the installation of concrete masonry units over an opening like a window or door. The device ...

Nate R. of Grain Valley, MO is the creator of the Simple Crossover, a support system for streamlining the installation of concrete masonry units over an opening like a window or door. The device ...