One 90 degree contra angle screwdriver was returned without packaging.The contra angle screwdriver was visually evaluated and found to be in overall good condition.When turning the knob, some friction was felt during parts of the turn.The driver was able to retain a blade, and was functionally tested by inserting a screw into a pre-drilled hole in a white oak block.While inserting/removing the screw, some friction was felt occasionally.The driver was disassembled for further inspection.The internal gearing components were found to have substantial discoloration, including in the head gear/bearing assembly, which prevented smooth rotation.There were scratches indicating normal use of the instrument.The complaint was confirmed as the contra angle screwdriver would not always rotate smoothly.For the contra angle screwdriver, substantial discoloration was found on the internal components, therefore, the most likely cause was determined to be improper cleaning/rinsing of the instrument.The instructions for use for this instrument states in the "sterility" section that, ¿staining and spotting may result on instruments that are steam sterilized if the instruments are not completely rinsed and free from residual chemicals.It is vital that proper drying cycles and the equipment manufacturer¿s recommendations are followed to prevent the formation of excess moisture and resultant water spotting.¿ the non-conformance database was reviewed and there was a non-conformance found regarding the difficulty rotating 90 degree contra angle screwdriver.There are no indications of manufacturing defects.
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