Material: Copper Aluminum Metal Steel Imperial flare size: 1/4", 5/16", 3/8", 3/4", 1/2", 5/8" O.D. TubingMetric flare size: 5mm, 6mm, 8mm, 10mm, 12mm, 16mm, 19mm O.D.Tubing Suitable for soft copper, aluminium and other softpipesArc frame ergonomic yoke design with double ring bar, guarantee a professional job with permanent levelling and nevermalpositionSteel ball precise position, simple and convenient operation Flaring Tool:Streamlined handle, so far the easiest operation design,save more time andenergyEccentric cone type, the special eccentric cone revolution will be allows the internal opening gradually and form 45 accurate and regular flare, preventing tube from slippagedownwardAdjustable knob, easily finish flaring work by rotating the handle in clockwise/anticlockwise. (Rotate the knob in anticlockwise then rotate the handle in clockwise until the eccentric cone tightly touches the tube, repeat till the flare is formed. Rotate the knob in clockwise, rotate the handle in anticlockwise, the alternate frictions make the flare more smoother and clean.) Limitation efficiently avoids making oversize flare by over rotation. After the clutch is separated, tube face will be more smoother and perfect in repeatedlyrotation Steel bearing position, perfect matches the expansion clip, to avoid tube slippage downward when flaring Expansion Clips:Expansion clips used in metric and imperial units, fit most of usual tube sizes in variousdiameters Double-ring clamps tightly clip tubes in expansion clips, prevent tube slippage ormovementTwin mounting screws in expansion clips can easily fits your workingbenchSome of non-standard tubes in diameters could be also used after opening the clips