General description The 6pcs Crimping Tool Drill Bit Set is designed for manual copper pipe expansion, providing a reliable solution for connecting copper pipes, particularly during air conditioning installations. This set includes six different sized drill bits to accommodate various pipe diameters, ensuring a tight and secure fit while maintaining the ductility of the copper tubing to prevent cracks and leaks. Technical specifications Material: Bearing steel Sizes: 7/8" (22.2 mm), 3/4" (19 mm), 5/8" (15.9 mm), 1/2" (12.7 mm), 3/8" (9.5 mm), 1/4" (6.3 mm) Dimensions: Approximately 45 mm, 50 mm, 55 mm Set includes: 6 pieces Allowable measurement error: 0 - 1 cm Installation The handle pipe expander is compact and lightweight, making it easy to carry and install. It is designed for straightforward operation, allowing users to replace old or damaged connections efficiently. Simply open the copper pipes and connect them securely using the appropriate drill bit size. Usage This tool is