Ningbo Guoten Industrial Co., Ltd. is a leading professional manufacturer of pipe fittings and cutting tools in China. We use advanced equipment to manufacture pipe fittings in accordance with relevant international standards, such as ANIS/ASME B16.22, EN1254-1 and others. Our solder joint copper fittings and solder rings copper fittings also have UPC certification. With consistently good quality and competitive prices, our products are exported to North America, Western Europe, Southeast Asia and other markets around the world. Our product range covers: 1) Solder joint copper fittings 2) Solder ring copper fittings 3) Air conditioner copper fittings 4) HSS straight shank twist drill bits 5) HSS drill blanks 6) HSS center drills for center holes 7) HSS deep hole drills 8) HSS small twist drill bits 9) HSS screw machine length straight shank twist drill bits 10) HSS jobber length drill bits and twist drill bits 11) HSS double-ended straight shank twist drill bits 12) HSS extra long straight shank twist drill bits 13) HSS stub straight shank twist drill bits 14) Masonry drills 15) Woodworking drills 16) Taps and dies 17) Diamond saw blades Our Factory is located in the port city of Ningbo, and is very convenient for business and shipping. Potential buyers are welcome to contact us for visit out factory any time.