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I'm interested in purchasing HSS twist drills for my upcoming projects. Could you please provide me with detailed information regarding your available options? Specifically, I'm looking for different sizes and specifications you offer, as well as any relevant technical data. Additionally, I would like to know the pricing, minimum order quantities, and lead times for delivery. If you have any special promotions or bulk discount options available, please share those as well. Looking forward to your prompt response so we can discuss this further. Thanks!