Step Drill Bits, 3PCS (28 Sizes) HSS Step Unibit Drill Bit Set with Automatic Center Punch, Double Cutting Blades, High-Speed Steel, Multiple Hole Stepped Up Bits for DIY Lovers with Case

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About This 28 STEP SIZES: 28-step sizes added: 6-step drill (3/16", 1/4", 5/16", 3/8", 7/16", 1/2"), 9-step drill (1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"), 13-st ep drill (1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"). TITANIUM COATING: Our high-speed steel drill bits, fortified with a titanium coating, offer exceptional durability and maintain sharpness even through demanding tasks. The titanium coating increases wear resistance and minimizes friction, resulting in cooler operation. PRO-DESIGN: The split point tip, set at a 118-degree angle, significantly enhances wear resistance, making the drill bits long-lasting and efficient. The innovative two-flute design facilitates smoother cutting and enables easy evacuation of material particles, promoting cleaner and more precise drilling operations. PREMIUM STEP BITS: Each unibit is constructed of industrial high-speed steel with a titanium nitride coating for durability and strength to punch and drill clean holes in materials like plastic, aluminum, wood, copper, stainless steel, and other types of sheet metal. QUICK CHANGE: The 1/4-inch hex shank makes for easy, convenient, and quick stepper bit switches and is compatible with impact ready power tools. Overview Cutting Diameter : 0.5 Inches Finish Type : Titanium Nitride Shank Type : Hex Brand : Maywoqi Tool Flute Type : Spiral Show more