Pounds of Spikes: Computes weight of a number of common bright spikes based on the spike size and number of spikes.
Spikes per Pound: Computes the number of common bright spikes based on the spike size and a weight of the spikes.
Pounds of Roofing Nails: Computes weight of a number of standard roofing nails based on the roofing nail size (11/4" or 11/2") and number of roofing nails.
Roofing Nails per Pound: Computes the number of standard roofing nails based on the roofing nail size (11/4" or 11/2") and the gross weight of the roofing nails.