4-ft Track Extension Kit for TMG-PSM36 Portable Sawmill, TMG-PSM36-4EXThe TMG PSM36 4EX 4 ft Track Extension Kit is an add on accessory for the TMG PSM36 Portable Sawmill which makes it capable of milling logs up to 15' in length. This is a heavy duty, all inclusive kit that comes with rails, steel crossers and all necessary hardware for installation. Engineered to maintain stability and make your sawmill even more functional and versatile. Compatible with Portable Sawmill TMG PSM36