Abrasive inserts The following list provides general information on the types of inserts available. For information on the best sizes and dimensions, see the related catalogue or contact Nicem’s technical experts for assistance. Types of inserts: Inserts in polyester, urea, ceramic, porcelain, steel and wood. Auxiliary Compounds Nicem manufactures several auxiliary compounds for the smoothing, semi-finishing, finishing and polishing of aluminum, Zn+Al+Mg alloys, brass, copper, iron alloys, stainless steel and other metals. Please contact us for assistance in choosing the solution that best matches your needs.