Gridder HandleOne gridder handle can be used for different sized spools. Constructed from heavy duty steel to last a lifetime. Includes a built in bed marker to easily center grid on your bed. Spool holders are extended to accommodate optional dibble spikes. Make sure to match your Gridder Handle and Spool! Gridder handles must match spools of the same bed width. So a 30" Gridder (GDR30) Handle works with all 30" Bed width Spools but a 30: Gridder Handle with not