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30MM Stainless Steel Metal HSS Drill Bit Hole Saw Set Alloy High Speed Steel Drill Bit Features: - HSS material, higher hardness, more durable. Titanium Coated, rust-proof. - Specially used on metal and steel plate, give fast and easy cutting. - They are good tools for you to make fantastic works. - Split tip drill prevents damage by gradually guiding cutter to material; no walking. - High speed steel teeth for fast cutting of clean, round holes. - Designed specifically for sheet metal cutting, even stainless steel. - Over drill flange built in to prevent penetration beyond the sheet metal. - Cuts quick, precise holes in stainless steel, mild steel, iron, copper and brass.