Gridder Master KitThe Master Kit provides the spools that will cover pretty much every hand transplanted crop on the market farm. The set includes a handle with extended spool holder, and three spools 2, 3, and a 4 row. Handle has a built in bed marker to easily center grid on a your bed. Minimal assembly required as the spools are shipped flat and the handle is shipped in two parts. This tool is extremely heavy duty and will last a lifetime.