The YG-1 E1072 uncoated high-speed steel extra-long-length square nose end mill has a 42-degree helix angle, two flutes, and a center-cutting design for general-purpose machining on aluminum and other nonferrous materials. The 42-degree helix angle offers increased cutting action compared to end mills with lower helix angles, as it moves excess material quickly up the spiral and away from the workpiece. Extra-long-length end mills have longer cutting edges than long-length end mills for applications with a high depth of cut. (Feed should be reduced by around 50%.) The two flutes have better chip-carrying capacity than end mills with more flutes while offering additional support when the tool goes deep into the material in applications with a high depth of cut. The center-cutting design has cutting teeth at the end of the tool, so it can be fed into the workpiece like a drill bit for applications. The tools square end creates sharp, unrounded cuts.

High-speed steel (HSS) is a common general-purpose steel for cutting tools. This tool has no coating or surface treatment. Cutting diameter tolerance is + 0.0010 to - 0.0000" for end mills with a different shank and cutting diameter and + 0.0015 to - 0.0000" for end mills with the same shank and cutting diameter. The tool has a Weldon shank.

End mills are designed to remove material and create multi-dimensional shapes and profiles. They have cutting edges along the outside diameter and flutes that remove chips from the cutting area and allow cooling fluids to enter. If heat is not reduced effectively, the tools cutting edges will dull and additional material buildup can occur. The number of flutes can range from two to eight. Two-flute designs offer the most efficient chip removal, but more flutes provide a smoother finish. The shank is the end of the tool held in place by a tool holder or machine. Center-cutting end mills can create three-dimensional shapes and profiles, and make plunge cuts similar to a drill bit. Non-center-cutting end mills are for applications such as peripheral milling and finishing, but cannot make plunge cuts.

YG-1 manufactures drills, taps, end mills, and rotary tooling. The company, founded in 1981, is headquartered in South Korea and has a U.S. office in Vernon Hills, IL.