PART NUMBER; HDDR-001+ CONTENTS: QTY 1 HDDR+ AXLE ASSEMBLY DESCRIPTION: Replacement axle for Dominator mounts manufactured after 6-3-2022 Stronger holding power than the standard HDDR-001 assembly Recommended for less frequent mode changes Allows existing Fish Obsessed Dominator mount users to add or subtract rotational tension to the pivoting joints of their mount. Switching between transducer modes becomes easier when you subtract a flat washer from the axle assembly to decrease the amount of pressure required to rotate your mount. Rough water and high hold applications require the use of all flat washers to increase the amount of pressure required to rotate your mount.