Freud SBOX8 box joint cutter set. New, never mounted, still in original case. Case has dings from my tool box.
Two 8" carbide blades, 5/8" arbor, table saw only. Flip the blades to change the joint: back-to-back cuts 1/4", face-to-face cuts 3/8". Includes instructions with a box-joint jig plan.
Made in Italy. TiCo high-density carbide, 20 teeth per blade. 20 degree hook, max 9,000 rpm. Works on a standard 10" table saw with 5/8" arbor.