Cheap And Discounts M6 M8 M10 M12 M16 100L 150L Stainless steel expansion screw, galvanized bolt, explosion lengthening external explosive tube bolt Wholesale. Buy Directly From Merchant zhongyinc Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.