Wrench Lot, ca. 1930’s-1950’s, USA. used Lectrolite wrench lot as follows 1-S-K Lectrolite 1/2″ x 9/16″-6 point Double Box-End Wrench, No. 1-S-K Lectrolite 5/8″ x 3/4″-6 point Double Box-End Wrench, No.