These inserts are generally compact and have a helical knurl for greater resistance and pullout strength. They can be used in almost all plastics and be used with hot and cold moldings. They are compact inserts suitable for insertion in all types of plastics and can be used with hot plastic Molding and cold plastic molding. Inserts are best suitable for electrical molded box application. Finish and Coating: Natural, Nickel Plated, Tin Plated or any coating as per customer specification.