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3/8 Dia. 7/8 Flute Length 3/8 Shank 2.5 OAL AlTiN coated 4 Flute. LakeShore endmills are made from the highest quality micro grain carbide to deliver the performance of the big name endmills at a little guy price. 30 degree helix help maximize production in a wide range of materials. An excellent general purpose ballnose endmill made in the USA.   Diameter Flute Length Shank Diameter Overall Length 3/8 7/8 3/8 2.5