This is a vintage celestron compustar drive base. No fork arms just the drive base with the worm gear drive within. This was celestrons early entry into the computer goto drive business. No fork arms or any control cables, power supply, or hand control. The drive base has a large worm gear inside and a large electric drive motor. Sold as is untested. Very solid drive base and with proper fork arms will carry a lot of weight. Center shaft is on large ball bearings.