Authentic Makita Router Straight bit T.C.T Size: 5/16″ Blade x 1/4″ Shaft x 3/4″ shaft lenght x 2-1/16″ Overall Length (D-15388) & 3/8″ Blade x 1/2″ Shaft x 25.4″ Shaft Length x 2-47/64″ Overall Length Two Flute