The 379B two star stainless steel reverse action plier has been specifically designed to expand the end of flexible tubing for inserting into plastic or metal fittings and connections. The tool is 5 long and expands a .10 tube to a .13 opening. As the handle is squeezed the tips open.Specs amp; FeaturesTubing Expander, Expands .10 to .13, Application: Designed to expand the end of flexible tubing for inserting into plastic or metal fittings and connections, Quality: , Surface Resistivity : Conductive, Shape: Straight, Material: SS, OAL: 5 (125mm), Body Width: 0.33 (8.25mm), Body Height: 0.324 (8.1mm), Tip Width: .1 (2.5mm)