ER-16 Collets 6-12 mm for Multishaft - New version
Amazon.co.jp: 1pc ER16 Spring Collet 1mm-12mm aa er Collet Chuck Set 0.008 Tool Holder ER16 Spring Collet ER16 Collet Chuck Set (Color: AA 0.008, Size: ER16-4.5mm) : DIY, Tools & Garden
Oumefar ER16 Extension Lathe Rod 12mm Outer Thread Dia 5 inch Router Collet Chuck Extension Rod Collet Chuck Holder Straight Shank C12-ER16A-100L for CNC Milling Machine - Amazon.com