【1200W Motor with Lock Switch】Powerful 1200W copper motor runs at 9000rpm for fast grout removal. Self-locking switch keeps the tool running without constant finger pressure 【No Extra Vacuum Needed】Built-in dust bag collects debris as you cut. No hose or external vacuum required—cleaner work environment for indoor tile projects 【No Extra Vacuum Needed】Built-in dust bag collects debris as you cut. No hose or external vacuum required—cleaner work environment for indoor tile projects 【Protects Tile Edges from Damage】Auto-rebound shaft and precision steel wheel follow the grout line. Reduces risk of chipping or scratching tiles during seam cleaning 【Water Port & Air Dry Function】V-shaped port adds water to reduce friction and keep the blade working effectively. Air vent dries the seam so you can re-caulk right away