Commstones should be twice as long as the width of the longest flat spot and as long as will work freely between adjacent brush sets. 1-1/4 in X 3/4 in X 1/2 in, Grade Ep Loose Stone, Commstone, Small Motor Combination.When compared to turning tools commstones are easier to use, more time effective, and remove less copper.
Holder also provides additional support to relatively fragile Brush Seater material. Brush Seater Holder, 1/2 in X 1/2 in X 15 in.Holder helps keep fingers away from rotating equipment, and the risk of possible shock is reduced because it is non-conductive.