Performance Tool W80590 Oil Pressure Switch Socket, 1-1/16 Fits 1" and 1-1/16" size units on 1991 and newer GM 4 cyl. &amp; 3.1 Liter V6 and 1987 and newer Chrysler. Use with 3/8" Dr. ratchet or 1-1/8" wrench. Heat treated alloy steel. Size: 1" &amp; 1-1/16"