This servo is stable and quick response time. It is perfect for DIY Projects. If you need cantrol angel 180°, please check the link: https://www.amazon.com/dp/B07MH1QRK5?ref=myi_title_dp
High-precision metal gears with hard anodizing, CNC aluminum middle Shell.
Maximum torque is up to 21.5 kg/cm (298.5 oz/in)@6.8V
270 degree rotation well-controlled, 360 degree rotation when power-off, perfect for robot joint activities. The servo tester link: https://www.amazon.com/dp/B01BY5LOZE?ref=myi_title_dp
Package List: 4 X DS3218MG Digital Servo, 4 X 25T Servo Arm. 30 days money back and 2 year warranty. If there is any problem please contact us feel free.