Tool (11) for simplified attachment of hose over a nipple, comprising two separate tool parts (12, 13) which each has a free end (121, 131) with a curved profile forming a convex side (126 resp. 136) and a concave side (127 resp. 137) arranged to be inserted into a tube end when the convex sides are equally oriented on both tool parts. At a distance from their free ends the tool parts each has an operating handle (123, 133) enabling rotation of the second tool part (13) of the tool 180 degrees in relation to the first tool part (12) thereby bringing the concave sides (127, 137) of said free ends of the tool parts to face one another. Method for use of the tool is also comprised.
