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Tct Hole Core Drill Bit Hole Saw for 5mm Stainless Steel Plate, Diamond Tools. High Hardness Material: Tungsten Carbide Alloy MK30 with hardness 89.5-90.5HRC. Wide Diameter Range: Available in diameters from 16mm to 160mm. Durable Blade Design: Combined blades prevent chipping and dropping during use. Stepped Drill Body: Prevents stuck products for smoother operation. Versatile Application: Suitable for aluminum, flat steel, and stainless steel plates. Long Service Life: Up to 200 cuts on 2mm stainless steel plates. Full Grinding Center: Ensures precision and stability during drilling. Customization Available: Supports customization from samples, designs, and full customization.