825 Superdrive with cable release, tensioner wheel, and 3 button control

825B Model for cable drums up to 6.5"
825C Model for cable drums up to 8.75"
825D Model for cable drums up to 10"

816 Superdrive with cable release, 3 button control, and manual chain hoist

816B Model for cable drums up to 6.5"
816C Model for cable drums up to 8.75"
816D Model for cable drums up to 10 "

815SS Superdrive with cable release and 3 button control for live axle steel roll-up sheet door

815IISL Slimline model with cable release and 3 button control for dead axle steel roll-up sheet door