Forstner bit

== English == === Etymology === From Forstner (proper noun) +‎ bit (noun). Named after American inventor, gunsmith and merchant Benjamin Forstner (1834–1897). First attested after 1886. === Noun === Forstner bit (plural Forstner bits) A kind of drill bit that bores precise flat-bottomed holes in wood, in any orientation with respect to the grain.