Made of high quality steel material, durable and long service life. When you need to install an air conditioner, you can use it to extend the copper pipes so that the two copper pipes are connected to each other. Precise positioning, easy to expand copper pipe, can be used with hand drill. Lightweight, compact, easy to carry and store. Two specifications are available to meet your diverse needs. Specification: Material:Steel Size Chart: 4 in 1: 20x100mm/0.79x3.94inch 5 in 1: 23x106mm/0.91x4.17inch Package Includes: 2x Copper Pipe Expander Drill Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!