http://www.fasteners-taiwan.com/bolts/ "Many Promised. Few Delivered. This is why ZONBIX excels." -- Raymond Liu, CEO of ZONBIX In order to fight against corrosion, bi-metal self-drilling screws (SDS) are introduced to the construction fields. Made with two different materials, bi-metal SDS gains the advantage of both. A popular combination is with carbon steel in the drill bit (hard enough for decent drilling performance), while having stainless steel in the shank (anti-corrosion and to provide long-term support and fastening purpose). Asides from various QC reports we do at ZONBIX, each SDS order can opt for additional testing on penetration capability, drilling speed, and a few more. Available in common IFI, DIN, and JIS standards with many head/drilling point combinations. Made to print orders are ZONBIX鈥檚 forte. A variety of packaging options to choose from: bulk, 8 different carton sizes, tool kits, etc. Customized labeling available. Worry-free, traceable production and shipping log records available in real-time on ZONBIX website. Almost every of our existing customers is a recurring customer. Most of our parts are produced via precise cold forging techniques. Blanket orders and ""mix-and-match"" orders are welcome. Start your ZONBIX Experience now!Bolts website:http://www.fasteners-taiwan.com/bolts/