Phoenix Mfg. V-Groove Drive Pulley, 3.5'' Diameter, 1/2" Bore, Die Cast

does this have keyway groove

Description says there are no set screw holes but one is shown in the picture. What is correct?

Please confirm what is meant by zinc. is this a zinc plated steel coupling? or is it built fully of zinc. please advise. i need to purchase 75 units.