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.