Attributes:* Cutting Edge Diameter: 12mm* Shank Diameter: 12mm* Cutting Edge Length: 100mm / 3.94"* Overall Length: 150mm / 5.91"* Material: 4341 High-Speed Steel* Finish: Gold and Black* Cutting Angle: 135 Degrees* Style: Straight ShankWhat Is Included:* 2 Pieces x Drill BitApplications & Features:---Applicable materials: Acrylic, plastic, and wood. soft metals such as copper, aluminum alloys, carbon steel, cast iron, and stainless steel thin plates (use with caution for thick plates)---Applications: The 4341 High-Speed Steel (HSS) Twist Drill is a versatile drill bit suitable for machining medium- to low-hardness materials, commonly used in vehicle maintenance for tasks like drilling sheet metal fasteners, replacing bolt holes, installing brackets, and creating wire harness mounts (non-precision applications),--- The 4341 high-speed steel (HSS) offers high hardness, excellent wear resistance, and good toughness.--- Gold and Black finish can enhance the corrosion and wear resistance of twist drills--- The 135° point angle ensures superior machining stability, delivers higher drilling accuracy, and enables smoother chip evacuationUseful Tips:---The 4341 high-speed steel (HSS) drill bit is designed for medium-to-low load machining and should not be used on hardened steels, high-alloy steels, thick stainless steel, or other ultra-hard materials.---Drill Bit Clamping: The drill bit must be securely clamped, but excessive force must be avoided. Ensure the drill bit is perpendicular to the workpiece surface—tilting can cause breakage or hole deviation.---Test Drilling on Scrap Material: Always perform a test drill on scrap material first to verify proper speed and feed rates before machining the actual workpiece.