印度采购需求：紧固件、干壁螺钉、SDS、自攻螺钉、自钻螺钉、刨花板螺钉

I'm looking to purchase self-drilling screws in all available sizes. Please provide me with your options and pricing details, as I'm interested in a quantity of 10 kg. If you have different specifications or types, I'd love to know about those as well. Additionally, it would be great if you could include information about your lead times and any bulk order discounts you might offer. I'm eager to establish a good partnership, so any details on your product quality and certifications would also be appreciated. Thanks!