Feature: High quality, high hardness alloy steel material Longer, labor-saving rocker with non-slip handle Tube clamps are hard, strong and fast forming, smooth surface does not hurt the pipe Pitch adjustment knob at the top with clear and smooth threads for easy screwing Expanding and shrinking pipe dual-use Specification: Name: Manual Aluminum and Copper Tube Crimping Machine Product Material: Alloy Steel Suitable tube material: Aluminum and Copper Suitable tube diameter: ≥5/8" Product application: tube expanding/shrinking Handle length: 155MM Product length: 230MM Product weight: 3KG Package size: 400x300x80MM