DEER PARK, NY — Mercer Abrasives, A Division of Mercer Tool Corp., appointed Frank. Prenda as national sales manager. Prenda has managed a sales team of 47 manufacturer's representatives in the sales of patented abrasive technologies throughout the United States and has developed an OEM market for specialized abrasive products selling to all major United States and Canadian abrasive manufacturers. In addition, Prenda has served on the Board of Directors for the National Industrial Representatives Association.