solid center auger bit
/ˈsɒlɪd ˈsɛntəɹ ˈɔːɡə ˈbɪt/
n
English · solid center auger bit中文 · 单螺旋木工钻头Español · broca helicoidal centralFrançais · mèche hélicoïdale à âme centrale
意味：Bit made up of a central shank encircled by a twist; it is very durable and especially designed for making deep holes.