The Lyndex-Nikken Round Collet 31/64 16C with part number 79786802 is a high-quality workholding tool designed for CNC machining and metalworking industries. This collet chuck features a 1-11/16-20 internal thread, M47.5 x 1.75 external thread, and a 4.31" overall length with a tolerance of 0.0011". It provides precise and reliable clamping for holding workpieces in place during machining, ensuring accuracy and consistency in the final product. Ideal for professionals in various industrial settings, this collet chuck is a valuable addition to any workholding and toolholding system.