The Sub-Frame Extension is required to support the track extension installed on your mobility-equipped Frontier OS35 sawmill. Package includes 7-feet (2.1m) of powder-coated steel sub-frame structure, two support jacks, connecting brackets and hardware.

Note: Maximum of one 7-foot (2.1m) extension recommended on trailer-equipped model. Additional sub-frame extension/support jack package required to support the extension sold separately.