Cobalt Drill Bit Size:21/64"(Diameter) x 3-5/16"( Flute Length) x 4-5/8"(Overall Length) HSS Cobalt Material: Crafted from a blend of high-speed steel (HSS) and cobalt alloy, this drill bit offers outstanding durability and heat resistance. The cobalt content enhances the bit's hardness, making it perfect for drilling into tough materials, including stainless steel, alloy steel, wood, plastic, and more Surface Treament: Gold Oxided Ember Finished Treatment Keeps High Hardness of Body of drill bit 135 Deg.Split Point Drill Angle: The 135-degree split point design eliminates the need for a pilot hole, allowing you to start drilling accurately without the bit wandering. This self-centering feature ensures that you achieve clean, precise holes every time Application: Drilling Through Stainless Steel, Metal, Steel, Cast Iron, Alloy Steel, Copper, Aluminum, Plastic..This drill bit is suitable for a wide range of applications, including metalworking, woodworking, and plastics. It's perfect for tasks like drilling holes for screws, bolts, or general-purpose drilling needs Versatile Features: Choose from a variety of sizes to match your specific project requirements. Whether you need a small bit for intricate tasks or a larger one for heavy-duty jobs, we've got you covered HSS drill bits set twist jobber length 135 split point angle parabolic flute 3 flat shank gold/black oxided metalworking tool hole cutter/drill for steel metal straight shank metal/steel drill cut general drilling fractional sizes