Alu hardcoated pins for NT1 gear differential are CNC-machined from premium lightweight Swiss 7075 T6 aluminum hardcoated for extra durability and long life. Set of 2. For serious racers who are conscious of weight savings XRAY offers lightweight alu differential pins. Lighter by 64%. Alu hardcoated pins for gear differential CNC-machined Premium lightweight Swiss 7075 T6 aluminumHardcoated for extra durability & long life 64% lighter than standard steel pins