drill remover

drill puller

drift

drill drawer

its end tapered for bout three or four threads

its end tapered for about eight or ten threads

full threads for the whole of its length

none of the above

taper tap

bottoming tap

second tap

none of these

its end tapered for about three or four threads

its end tapered for about eight or ten threads

full threads for the whole of its length

none of the above

shank, material and diameter

shank, lip angle and size of flute

material, length of body and helix angle

any one of these