This is a A-ADJARM Arm, Depth Adjuster PN: ADJARMMain Description As Following : A-ADJARM Arm, Depth Adjuster PN: ADJARM Found in Section & Models : Planting > Seed/Fertilizer Opener & Coulter, John Deere GRAIN DRILL: H540F, John Deere GRAIN DRILL: H550F, John Deere GRAIN DRILL: H560F, John Deere GRAIN DRILL: N530, John Deere GRAIN DRILL: N530C, John Deere GRAIN DRILL: N530F, John Deere GRAIN DRILL: N536, John Deere GRAIN DRILL: N536C, John Deere GRAIN DRILL: N540, John Deere GRAIN DRILL: N540C, John Deere GRAIN DRILL: N540F, John Deere GRAIN DRILL: N542, John Deere GRAIN DRILL: N542C, John Deere GRAIN DRILL: N543F, John Deere GRAIN DRILL: N550, John Deere GRAIN DRILL: N560, John Deere GRAIN DRILL: N560F, John Deere GRAIN DRILL: 1560, John Deere GRAIN DRILL: 1565, John Deere GRAIN DRILL: 1590 Associated Items : New Also This is An Aftermarket Product And : Universal for both right and left openers, with the use of spacer washer. Machined from solid steel. Two bolt clamp design tightens firmly on worn spindle shaft, providing a superior clamping force. Relief cut design allows for maintained tension on gauge wheel even after wear. Designed with 1/2" ratchet opening to provide leverage to help with sticky gauge wheels. Includes: Spacer washer. Replaces: AN282108 and AN282109