Upgrading your Robobuilder servos to metal gears will offer improved reliability and durability under heavy load.
The Metal Gear Upgrade for wCK1111 Servos includes the Metal gear necessary to
the Plastic Gear on the Servo to Metal. This Product includes the necessary
gears to Upgrade Four (4x) wCK servos to Full Metal Gears.
Kit Contents and Assembly Instructions:
Advanced Users: Obtaining more torque when using Full Metal Gears:
In addition to improve reliability, servos with all metal gears are also able to provide more torque and higher speeds by applying higher voltages.
Bellow you can find the specifications for the servos operating at different voltages.
This set Includes 4x Metal Gears only (it's NOT the complete servo) and can be used to upgrade up to 4x wCK 1111 servos.