A Persian drill is a drill which is turned by pushing a nut back and forth along a spirally grooved drill holder. It was formerly used for delicate operations such as jewellery making and dentistry. A ratcheting screwdriver with a 'spiral ratchet' mechanism may be used as a Persian drill.
Famous quotes containing the words persian and/or drill:
“If one doubts whether Grecian valor and patriotism are not a fiction of the poets, he may go to Athens and see still upon the walls of the temple of Minerva the circular marks made by the shields taken from the enemy in the Persian war, which were suspended there. We have not far to seek for living and unquestionable evidence. The very dust takes shape and confirms some story which we had read.”
—Henry David Thoreau (1817–1862)
“Swift blazing flag of the regiment,
Eagle with crest of red and gold,
These men were born to drill and die.
Point for them the virtue of slaughter,
Make plain to them the excellence of killing
And a field where a thousand corpses lie.”
—Stephen Crane (1871–1900)