The ESPERT system, a hand-held, electric-powered deburring, grinding, and polishing tool from NSK America Corp., can be used for fine art carving or finishing and engraving on gemstones and jewelry. The device has a stepless tool speed range of 2,000 to 40,000 rpm. The system consists of a power- and function-control unit, a brushless Hall-element DC motor, a connecting cord, and attachments for rotary and reciprocating work tasks. The brushless design eliminates the need for brush replacement and reduces electric and mechanical noises that can interfere with other equipment. NSK America Corp., 700 Cooper Court, Suite B, Schaumburg, IL 60173; (847) 843-7664, fax (847) 843-7622.

Rio Grande offers cleaners for general polishing and casting shop use. All-purpose Rio Rapid Cleaner emulsifies buffing compound and everyday buildup of oils, dirt, and cosmetics. It can be used in an ultrasonic cleaner or as a soak and is safe for plastics and fabrics. BlastOff Investment Remover solution is designed for use with ultrasonic machines. It is suitable for final cleanup and can be reused after investment has been filtered from the solution. Rio Grande Gems & Findings, 7500 Bluewater Rd., N.W., Albuquerque, NM 87121-1962; (800) 545-6566, fax (800) 965-2329, www.riogrande.com.