Specifications:-Cutting Edge Diameter: 24mm-Shank Diameter: 1/2 inch-Cutting Edge Length: 57.15mm/2.25 inch-Total Length: 150mm/5.9 inch-Split Point: 135°Material:-The 4341 High-speed steel twist drill bits delivers high hardness, wear resistance, and toughness for light-duty machining of low-carbon steel, aluminum, brass, acrylic, plastic, and wood, offering optimal cost-performance balance for small equipment, with strong adaptability, also including auto repair, modification, appliance installation repairSurface Treatment:-The black nitriding finish during the nitriding process effectively resists oxidation and corrosion, making it suitable for use in harsh environments and reducing maintenance frequency, provides lubricity, while the small pore structure effectively retains coolant, enhancing the cooling effect during the cutting process and reducing wearTIP:-When ues reduced shank drill bit, it's important to maintain a 90-degree vertical angle to ensure precision and accuracy.-For power drills, it's recommended to use a model with a power rating of 750W or higher.-Use water or coolant to lower the temperature and prevent the drill bit from overheating, especially when drilling stainless steel materials.-For metals with high hardness and dense grain structure, use a slower drill speed than normal drilling, and cooling the workpiece will yield better results.-When machining thick workpieces, if there are issues with chip removal, promptly clear the debris.Package Content:-1 pcs x Reduced Shank Drill Bit