The one I have, is an OEM bought from AutoZone . It is 20-200 in/lbs. it came with a certificate of accuracy, instructions for use, go above desired setting and adjust down, and for storage one full turn below lowest setting, other than the locking screw unscrewing when removing load, it is a great Wrench, I test it regularly using an 8point socket attached to my Matco TW, and the OEM, and test above the setting on the Matco , and unload to below the setting of the Matco. The price in 7/2015 was $52.65 including sales tax. WORTH EVERY PENNY ! The C.O.A. and the receipt (lifetime warranty)are stored folded up neatly in the storage case.