Replacement for SH99919, SH33602 chopper knives. For John Deere combines 6600, 6620, 7700, 7720, 8820, 9400, 9500, 9600 with drum style chopper and bolt-on knives.
For combines not originally equipped with single point adjustment. For John Deere combines 9650STS, 9750STS, 9660STS, 9760STS, 9860STS s/n 710001 & up with fine cut 2-speed chopper.