Lactarius repraesentaneus Lactarius repraesentaneus Lactarius repraesentaneus, commonly known as the northern bearded milkcap, the northern milkcap, or the purple-staining milkcap, is a species of fungus in the Russulaceae family. It has a northerly distribution, and is found in temperate regions of North America and Europe, associated with spruce trees. Distinguishing features of its fruit body include the large orange-yellow cap up to wide, cream to pale yellow gills, and a yellow coarsely-pitted stem that is up to long and thick. Cut fruit bodies ooze a white latex that will stain mushroom tissue lilac to purple. Several chemicals have been isolated and identified
Drill bit shank One particular type of reduced-shank drill bits are Silver & Deming (S&D) bits, whose sets run from to drill body diameter with a standard reduced shank for all. This allows drill presses with chucks to run the larger drills. S&D bits are long with a flute length. The name comes from a company in Salem, Ohio that broke up into other companies circa 1890; bits of this design were popularized by that company. The flats of a hex shank can either be machined on a round shank, as in the photograph, or be the natural flats of hex bar stock.