1. PBT MATERIAL: Bristles are composed with PBT material. PBT will be softer, flexible, not easy to mix floating hairs and produce debris when cleaning the car compared with the traditional PVC and PP mateiral. You do not have to worries it leave lint marks on your car. Straight wire soft bristles, remove stubborn stains more effectively weanwhile will not scratch car paint. 2.5 SIDED DESIGN: Can maximizes surface area , covering a larger area and you can clean dirt in multi angles, saving your cleaning time and effort. The bristles full wrap around the entire brush head so you don't have to worry about banging or scratching the car with the hard plastic, which making a perfect all-around truck wash brush. 3.ANGLED-FACE: Is optimally designed to fits into corners and conforms to contours and uneven surfaces, allows the bristles to reach into small, hard-to-clean areas, scrubbing away hard-to-reach grease and grime. This car exterior cleaning brush effectively removes water stains, mud, and other stubborn stains that won't scratch paint, suitable for cleaning axle, rearview mirror, engine, tire and other narrow gaps. 4.4 SECTIONS LONG HANDLE: Brush rod which can extend up to 60'/150 cm, you can ly assemble the poles for different usage, making it easy to reach from your car's bottom trim to the tops of vehicle roofs. Spring-loaded snap installation to make the car washing equipment rod stable and firm, not stretch or retract at will. It also features EVA foam grips for extra control. You can hold the pole well even if your hand is wet or slippery.