Pilot Drill Size

1/4 in dia x 3-3/32 in L

1/4 in dia x 4 in L

1/4" dia. X 4-5/16" L

1/4" dia. x 2-7/8" L

1/4" dia. x 3-1/16" L

1/4" dia. x 4" L

1/4" dia. x 4-5/16" L, 1/4" dia. x 3-1/16" L

1/4" x 4" L, 1/4" x 3" L

5/16 in dia x 4 in L