Greenlee
Greenlee 38524 .312 Hex Arbor Application: Use With Greenlee Bimetal Hole Saws, Recessed Light Hole Saws And Carbide-Grit Hole Saws (Carbide-Tipped Pilot Drill Sold Separately), Can Be Used With Greenlee NO 901 Or 904 Bit Extensions, 9/16 IN - 1-3/16 IN...