This is a servo mount designed for the SG90 style servo (user to supply) and is specifically designed for points/turnouts and for driving semaphore signals. It is intended for use with the Tam Valley Octopus and Frog Juicer or a micro-switch (user to supply) for switching polarity on the frog of a point. The mounting kit is made out of tough acrylic plastic. There are sketches for using an Arduino as a servo controller in the files section of the Arduini yahoo group. The point can be switched with a brass wire as shown in the photo. Offered assembled or as a kit.