AUGER, 4" , 1-3/8" HEX-

-Auger bit. Digs a 4 inch nominal diameter hole up to 36 inches deep. Heat treated, alloy steel SB45 Screw Bit is field replaceable.
-1-3/8 inch female hexagon auger drive connection.
-36 inch effective digging depth.
-4-1/2 inch cutting diameter when boring head is in new condition.