XRAY Active Diff segments are CNC-machined from very tough steel, and have very precisely-machined \'V\' ramp grooves with 60¡Æ angle for easy engagement/disengagement. The segment is hardened to ensure long life and durability. The segments are laser engraved with \"60¡Æ\" for easy and instant recognition. Set of 2.The 60¡Æ segments provide a very good balance of performance between on- and off-power. On-power the diff becomes hard after a delay. Off-power the diff becomes free after a delay. For use on low traction tracks.Active Differential Segments are available in three different alternatives:#352123 - 60¡Æ#352125 - 90¡Æ#352127 - 120¡ÆActive Differential Segments fit:#325100 - Active Differential for XB2/XT2/SCX#365100 - Active Differential for XB4/XT4 Font/Rear#365101 - Active Differential for XB4/XT4 Center