Fits I" and 1-1/16" switches up to 1-5/8" long. One socket with the correct length to fit most 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. Skin-packed Shipping wt. 5 oz.