SA-Tools specializes in manufacturing micro end mills, and radius end mills are one of them. A radius end mill is a type of cutting tool used in machining operations to create rounded corners and edges in workpieces. 

Radius End Mills, also known as corner radius milling cutters, are used to create rounded corners and edges in a variety of materials. They are designed with a cutting edge that is curved outward in the shape of a radius. This allows them to produce intricate shapes and details with precision accuracy.

In addition, they can be used for both roughing and finishing operations on a variety of materials such as aluminum, brass, bronze, steel, plastic, wood and more. With their ability to create intricate shapes with high precision accuracy, Radius End Mills have become an essential tool for many machinists and fabricators.