OTC's set of 8 sensor sockets covers sensor applications found on today's vehicles. Included sockets are slotted and contoured to provide easy access to, and removal/installation of, hard to reach sensors. Includes: No. 4673-1 - 29mm Vacuum Switch & O2 Socket - 1/2 Dr.; No. 4673-2 - 7/8 in. Vacuum Switch & O2 Socket (wide slot) - 3/8 Dr.; No. 4673-3 - 27mm Thermal Sensor Switch - 1/2 Dr.; No. 4673-4 - 7/8 in. Vacuum Switch & O2 Socket (narrow slot) - 3/8 Dr.; No. 4673-5 - 1-1/16 & 1 in. Oil Press. Sending Unit Socket - 3/8 Dr.; No.4673-6 - 7/8 in. O2 Sensor Socket - offset 1/2 Dr.; No. 4673-7 - 7/8 in. O2 Sensor Socket (low profile) - offset 3/8 Dr.; No. 4437-8 - 1-1/16 in. and 1 in. Oil Pressure Socket (short access) - 3/8 Dr.; durable blow-molded plastic storage case. Value is at the core of the OTC tool and equipment portfolio. For a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it's a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians' productivity and shop profits.