Cylindrical

for 1.1 and 1.3 drill bits

for 1.5 and 1.8 drill bits

for 2.0 and 2.5 drill bits

for 2.7, 3.2, 3.3 drill bits

for 3.3, 3.5, 3.8 drill bits

for 4.0 and 4.5 drill bits