... , Wood, Plywood, Ceiling, etc.Yuankang Back Pack Drywall Sander 1.Product IntroductionYuankang Back Pack Drywall Sander is an updated product based on ... two big parts------Sanding Machine and Vacuum Cleaner. Our Back Pack Sander is Dust Free, which can extremely protect users ... circumstance .High Efficiency Drywall SanderCompared with Manual Work Our Back Pack Sander is Portable to carry and use!You can ...