Feature:1. Using high‑quality bearing steel material, high hardness, wear resistance.2. It must be installed in a manual electric drill, strong and durable.3. Contain 6 expanders of different sizes, which can meet the needs of daily maintenance.4. Excellent workmanship, easy installation and long service life.5. This pipe expander can connect two copper pipes to each other when the air conditioner is installed.Specification:Item Type: Pipe ExpanderMaterial: Bearing SteelWeight: Approx. 170g / 6ozFunction: When air conditioning is installed, expand copper tube, make two copper tube mutual link. (To be installed on hand electric drill.)Size:7/8 (Approx. 5x2cm / 2.0x0.8in)3/4 (Approx. 5x2cm / 2.0x0.8in)5/8 (Approx. 4.5x1.7cm / 1.8x0.7in)1/2 (Approx. 4.5x1.5cm / 1.8x0.6in)3/8 (Approx. 4x1.3cm / 1.6x0.5in)1/4 (Approx. 4x1.1cm / 1.6x0.4in) Package List:6 x Pipe ExpanderNote:1.Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.