Fits 4B and 4B+ mailboxes. HL1 (Hudson Lock Replacement), .812 Cylinder Length Threaded, 7/8" face diameter, 5 OEM replacement cams, 2 nickel plated keys, Hudson Keyway. Ideal for High Security application with over-sized door thickness. Mount with Hex Nut Included. Key is removable in locked position only. 90 degree counter-clockwise to open. Hudson Lock part no. PT812RN5CPA. Uses
CO106 1003M key blank.