For the machinists, metalworkers, and serious DIYers out there, this Ruko 116049 is a specific and useful tool. It's a hard end mill, Shape G, with an SPG 'bow' in the tip. Let's break down the specs: the cutting head diameter is 3 mm, the head length is 14 mm, the shank diameter is also 3 mm, and the total tool length is 38 mm. It features a cross-cut design (fine kz4) that gives it great cutting power and high toughness. The serrated crossover shank actually provides greater cutting capacity compared to a standard end mill. So what's it good for? It's perfect for jobs like deburring sharp edges, killing edges (smoothing them out), adjusting surfaces and angles, removing welding cords, and working in tough materials like high-alloy steels, corrosion/acid/heat-resistant cast steel, and even some plastics. It's a precision tool for when you need a clean, controlled cut in detailed work. If you know what a Shape G SPG end mill is, you probably need this in your toolbox.