- Six tube sizes in one tool: the block holds 1/4, 5/16, 3/8, 1/2, 5/8 and 3/4 inch copper tubing, covering the common air conditioning and refrigeration line sizes without swapping tools - 45 degree flare angle: the eccentric cone rolls the tube wall outward in one smooth pass, forming a round 45 degree lip that seats flat against the flare nut for a tight joint - Aluminum alloy build: cast block and cone are machined from aluminum alloy, and the 942 g tool is steady in the hand yet light enough to carry in a service bag - Hand driven, no power needed: sized for line set connections behind a condenser, inside a wall chase or on a job site where a bench vise is not available - In the box: one 45 degree eccentric flaring tool with a six size tube block. Cut the tube square and deburr the end first so the flare forms clean and round