SMARTWALL 4 in. x 2 ft. x 8 ft. All in One Wall Panel with Electrical Box Electric Air Compressors Cast iron construction for solid base Cast iron construction for solid base and smooth operation Cast iron fence and support system Simple fence adjust system with positive stops at 90 ° and 45 ° Aluminum cutter head with steel knives Simple jack screw arrangement for easy adjustment and knife changes Aluminum cutterhead with two knives Simple jack screw arrangement offers easy adjustment when changing knives Built in dust blower ejects chips efficiently and virtually eliminates clogged dust chutes 12 amp 4 Commercial No Blower Type Handheld Blower Vacuum Product Width (in quicker build versus conventional wood or steel construction methods Panels are tongue and groove and simply attach at the top to your floor joists and at the bottom to your subfloor using 2 in