The ATD Tools 6-Ton Double Lock Ratchet Style Jack Stands, No. 7ATD-7446A, features welded foot pads to provide added stability. Its double lock design with safety pin offers additional security when working beneath a vehicle and its counter-weighted pawl locks the ratchet bar securely in place. The jack stands are made from sturdy, welded steel and meets or exceeds ASME/PASE 2019 standards. The height ranges from 15-7/8" to 24-1/2". The base size measures 11-1/4" by 9-7/8".