9200 series vehicular slide gate operators are designed for use on very large and very heavy gates in maximum security applications only. These operators must never be used in applications serving the general public. These heavy duty operators use a high tensile steel alloy roller chain as the pulling medium, which is immune to slippage and the challenges of uneven terrain – and also simplifies installation. User can set the speed of the gate up to 4 ft/sec. (1.2 m/sec.), with an electronic braking option.
Read more at: https://www.doorking.com/maxsec/