I can get many brand name wrenches calibrated. Most are in the $50 range without repairs. Sometimes they need parts which can't be found if the tool is a off brand. I don't know your budget but the Precision Instruments are very high quality and they are the only ones that won't be damaged if not backed down to low torque for storage. The micrometer style (screw the handle in and out for torque) has a spring inside that will get weak and take a set if left set at higher torque. They don't stay calibrated as long as the Precision wrenches which have a tuning fork type unit inside. If you buy a used cheapie off e bay you might get a tool that can't be calibrated or repaired. tmm