Fits 1" and 1 1/16" Switches Up To 1 5/8" Long. One socket with the correct length to fit 1" and 1 1/16" oil pressure switches (for vehicles equipped with warning lights). 1 7/8" overall height for clearance. Use with 3/8" drive or 1 1/8" hex. *WIll work on 1981 VW van *Will work on 2013 Yukon, 5.3L, VIN 7 if has original parts...if aftermarket parts, use the 13900 1-5/16” diameter x 1.900 “ long *Will work on 1967 Plymouth GTX w/440 cu in. engine