The ProElite 3 Pack Multipurpose Detail Brushes are a high quality tool for hard to clean areas. 60% of the bristles are natural boar's hair, known for its softness and used by professional detailers for years. 40% of the bristles are synthetic fibers adding strength and durability. These brushes can clean the most delicate surfaces but are built to last. The natural maple wood handles are classy, comfortable, and have a convenient peg hole for storage. The set comes with 3 brush head diameters - 0.75, 1, and 1.25 inches allowing you to pick the perfect sized brush for each application. These brushes are great for interior, exterior, and even under the hood cleaning. They clean up easily with soap and water after use and will last years with proper care.