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I'd suggest getting Precision Instruments unit. They are the ones Snap On sells (for a lot more than with the Precision name on it). They are a split beam design which means that you do not have to lower the torque setting to relieve pressure on the spring when you are done. This is what causes most torque wrenchs to become inaccurate. Also, they are 100% metal so they are not going to break.
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