ELECTRICIANS TYPE; BI-METAL MATERIAL; 13 PIECE(S); PACKAGING TYPE PLASTIC CASE; ARBOR PART NUMBERS M24K, M44, M45P; ARBOR SHANK SIZES 7/16 INCH HEX 1/2 INCH-20 TPI, 7/16 INCH HEX 5/8 INCH-18 TPI, 1/4 INCH ROUND 1/2 INCH-20 TPI