6-Piece Sensor Socket Set Includes: No. 4673-1 � 29 mm pressure / vacuum switch socket. No. 4673-2 � 7/8" vacuum switch socket. No. 4673-3 � 27 mm oil pressure sending unit socket. No. 4673-4 � 7/8" vacuum switch socket. No. 4673-5 � 1-1/16" & 1" oil pressure sending unit socket. No. 4673-7 � 7/8" short oxygen sensor socket. No. 4673 � 6-Piece sensor socket set. Wt. 4 lbs. 10 oz.