(b)(4).Visual inspection of the device confirms that there are deep gouges and sharp burrs on the top and bottom surfaces of the strike handle.It has also been noted that there is damage on the threaded rod and abrasion visible on the 3.0 mm hole.Functional test using plug gauges found the 2.4mm feature functioned as intended while the 3.0mm feature did not hold plug gauges as intended.Review of the device history record did not find any deviation or anomalies.Dimensions were found conforming to print specifications where measured.Hardness testing confirms the hardness to be within specification.The device had been in the field for approximately 6 years 4 months.It is unknown how many times the devices had been used during that time.This device is used for treatment.Noted damage on the threaded rod locking teeth may contributed to the reported event.The hole damage is likely from wear due to repeated usage.A new design has been released with changes to increase hardness of the strike plate and tighten tolerance of the guide wire holes.The goal of these changes is to improve gripping strength and durability, which will provide additional useful life from the device.This mdr was identified during an internal retrospective review to meet reporting requirements and therefore is being filed retrospectively.
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