RDO Collets - OZ Collets RDO Collets are designed for high gripping strength collet system was originated in Europe and are sometimes known as Ortlieb style collets or Full Grip Collets. Many machines designed for wood working also use this system. Lexis RDO Collets / OZ collets system is recommended for milling, drilling and boring applications. Many high production routing systems manufacturers have standardized on this system. Lexis RDO Collets / OZ collets system Size Ranges are RDO 16 Collet (Form A), RDO 20 Collet, RDO25 Collet, RDO35 Collet & RDO44 Collet. Lexis RDO Collet / OZ Collets metric sizes range starting from 2mm Dia to 32mm with 0.5mm incremental and Inches sizes starting from 1/8” to 1” Inch. RDO Collets also known in the industry as OZ Collet and Ortlieb collets. RDO 16 Collet (Form A Style) RDO 20 Collet RDO 25 Collet RDO35 Collet RDO44 Collet OZ Collet Ortlieb Collet OZ25 Collet OZ32 Collet