Features Made of high‑quality stainless steel material, strong and durable, wear‑resistant and rust‑resistant. With multiple specifications, it can meet the needs of various work scenarios. Ergonomics, comfortable hand feeling, simple operation, even beginners can get started quickly. Suitable for scenes such as mechanical processing, pipeline engineering, air‑conditioning pipeline, etc. Hex triangular handle tube expander is used to expand the copper tube and connect the two copper tubes to each other Specification: Item Type: Swaging Tool Drill Bit Set Material: Stainless Steel Hex Handle Specifications: Approx. 6.35mm / 0.3in Size: 7/8 (22.2mm) 3/4 (19mm) 5/8 (15.9mm) 1/2 (12.7mm) 3/8 (9.5mm) 1/4 (6.3mm) Purpose: Flaring and Expansion of Copper Pipe Applicable Scenarios: Mechanical Processing, Pipeline Engineering, Air-Conditioning Pipelines Package List:6 x Reamer Package List 6 x Reamer