印度采购需求：紧固件、石膏板螺丝、SDS螺丝、自攻螺丝、自钻螺丝、刨花板螺丝

I'm looking to source drywall screws for an upcoming project and need to understand your offerings in this area. Specifically, I'm interested in details like the sizes you have available, the materials used, and any special features they might have. It's important for me to know about your pricing, minimum order quantities, and lead times as well. Additionally, if you have any certifications or quality assurance processes in place, that would be great to know. I'm also curious if you provide samples or if there's flexibility in customizing orders based on specific requirements. Please share any relevant catalogs or technical datasheets to help me make an informed decision. Looking forward to your prompt response!