http://www.calculated.com/ptp See how the Pipe Trades Pro pipefitter's calculator by Calculated Industries lets you easily solve simple offsets and rolling offsets with known and unknown fitting angles. Dedicated keys make it simple and intuitive. And builtin US to metric and plumbing unit conversions, flow, velocity, pressure calculations and more make it useful every day. A great tool for pipefitters, steamfitters, sprinkler fitters, commercial plumbers, pipe welders or anyone that does pipe cutting and pipe welding. This quick overview briefly shows how to calculate simple and more complex rolling offsets far more quickly, simply and accurately and lets you improve your productivity and profitability every day. Spend less time looking at charts and tables and more time setting pipe! For more information or to find the dealer nearest you call 8008548075 or go to http://www.Calculated.com