Hard-bristled Brush: The cleaning brushes adopts ultra-fine and ultra-hard PET brush head, which is more durable, and can easily remove dirt and grime in the narrowest gaps, making your home cleaner and more hygienic. Non-Slip Handle: The window groove cleaning brush has an ergonomic handle for comfortable holding and easy wiping. The handle is designed with small holes for easy hanging to save space. Flat Small Brush Head Design: The gap cleaning brush's small flat brush head design allows for a thorough cleaning of any crevices, corners, tight spaces or crevices in the room. Easy to Clean: The crevice cleaning brush is designed to clean crevices and corners. The window groove cleaning brush has strong detergency and is easy to clean, just rinse with water and dry quickly. Multi-purpose: The cleaning brushes small spaces is perfect for cleaning bathroom faucets, corners, faucets, all tile surfaces, shower door rails, sink drains, narrow window frames and more.