Techniks collets Techniks supplies all sizes and styles of collets for CNC routers direct to the woodworking industry. The product line includes: ER, TG, Perske, SYOZ, RDO, EOC and Heian collets, nuts and accessories. When ordering collets, Techniks recommends upgrading to "Power Coat" nuts, because they hold up to 75 percent tighter than standard nuts, and extend tool life according to lab tests. "Power Coat" Ultra-High Speed nuts are balanced for operation up to 60,000 rpm. Left-handed nuts are available on request.