Over time your grip's leather will become slick and caked with chalk. The GRIP BRUSH has fine steel bristles which will remove the chalk and brush up the nap of the leather - a must for all grip bags.
Never brush over the dowel threads with the grip brush - it will cut the threads. Brush the grip palm piece only - below the dowel threads.
Never rub a grip brush over the dowel threads as it will cut the dowel threads. Cut dowel threads are not covered under warranty.