Diamond/ Straight/ Unidirectional Type Knurling Insert is made of quality grade brass which ensures optimum durability along with long lasting trouble free service. The Knurling Insert is available in diamond/ straight/ unidirectional type construction. The Knurling Insert is strong and rigid in construction and requires minimal maintenance. Diamond/ Straight/ Unidirectional Type Knurling Insert can be custom made in various sizes and dimensions as per specific requirements.