21/64″ stub drill bit, 1 3/4″ flute length, 3 1/6″ overall length. 5/16″” stub drill bit, 1 3/4″ flute length, 3 1/6″ overall length Long drill bits tend to wander if they hit tight wood grain causing off-center holes. $4.50 each + s/h Made in the USA
Use 21/64″ bit for hard wood and 5/16″ bit for soft wood