Wuxi Chaoyi Standard Parts Co., Ltd. specializes in manufacturing drywall screws, chipboard screws, self-tapping screws, self-drilling screws, concrete screws, window screws, wood screws, bolts, nuts, etc. with standards of DIN and ANSI. Our products are ISO9001:2000 certified. We can also produce custom-made non-standard parts according to clients?drawings or samples.