Flexible & durable: pp material handle which gives you a comfortable grip. it is removable and durable, very convenient for people to hold tightly. this brush owns a good cleaning power, which can clean the door and window sliding rails, gaps or more places.cleaning function: you can use a dry brush or a wet brush to help you according to actual situation to satisfy your needs. when the stubborn stains are difficult to remove, you can use a wet or dry brush to scrub them, brush contains 2 polypropylene bristles.