S i ze : 1 / 4 " ( M ) x 3 / 8 " ( F ) , 3 / 8 " ( M ) x 1 / 4 " ( F ) , 1 / 2 " ( M ) x 3/8"(F),3/8"(M) x 1/2"(F) ,3/4"(M) x 1/2"(F),1/2"(M) x 3/4"(F) Material: Chromium Molybdenum