The Micro 100 Square End Mill Carbide is a high-performance end mill for milling a variety of materials. It features a square end design for milling 90 degree shoulders and angles. The end mill has 4 flutes and is made of solid carbide with TiAlN coating for wear resistance and heat resistance. It has a 1/2" shank diameter and is available in multiple diameters from 1/8" to 1/2". The square end mill can achieve precise right angle corners in steels, aluminum, titanium and other alloys. It's well-suited for shoulder milling, slotting and side milling applications. The carbide construction provides strength and tool life.