... inner cornor rubing 4.Heavy Duty 5.Portable Drywall Grinder Machine YK Multifunctional Dust Free Drywall sander(SIM-JZ-IV ... 180mmDust Absorption Rate: 98%Main Shaft: M8Instrument Components: Sanding Machine, Vacuum Cleaner, Dust Sucking Conduit, Dust Collecting Bag, Braces, ... Case. Title PowerWeight Revolving SpeedSander 380W1.7kg3100 turn/minSuction Machine 120W2.8kg8000 turn/minTotal 4.5kg PS: Total ...