Multifunctional copper pipe tool kit produces pipe expansion and flaring effects through friction! Pipes expansion effect: The copper pipes at both ends are directly connected. Flaring effect: No leakage when connecting with the doorbell. Main FeaturesMultiple sizes1/4",3/8",1/2",5/8",3/4",7/8", 6 different sizes in the set you choose to meet your needs. Applicable models: electric hand drill, lithium electric drill, bench drill. MaterialMade of carbon steel. It has high and uniform hardness and wear resistance and high flexibility limit, a good helper for work and life. PrecisionFlares will always be the same size and fit perfectly; The waves present the ideal depth and a tight fit that will facilitate soldering, reducing fatigue stress in the coupling area. Perfect Forging DepthA full range of forging tools makes it Easy to expand HVAC pipes, The forging plug will provide great depth for a perfect fit. Function and Easy InstallationAfter installing the air conditioner, unroll the copper pipe, make two mutual copper pipes (To be installed in the handheld electric drill). Ideal for installers, it doesn't matter if you're learning or doing it. Specifications Product Weight59G Package ContentsMultifunctional Copper Tube Tool Kit 1 MaterialCarbon Steel