The Micro 100 Square End Mill Center Cutting is a high-performance tool for milling various materials. This 1/4" diameter, 4 flute end mill has a square end for 90-degree shoulders and corners in aluminum, steel, stainless steel, cast iron, titanium, plastic, and more. Its center cutting design allows plunge cuts. Made from solid carbide, it has a 1/4" shank diameter, 2-1/2" overall length, and TiAlN coating for heat resistance. Recommended speed is 20,000 rpm with feed rates from .001 to .004 ipr. Made in the USA by Micro 100 Tool, a precision cutting tool manufacturer.