16 degree Collets with DIN6499/ISO15488 Standard. All of our AR collets have passed strict inspection. High-quality AR collets with excellent precision achieve high machining accuracy. Also the great runout system reduces stress on the cutter and also contributes to reduction of running costs. (Inch sizes are also available) AR (ER) 8:D=0.3-5 mm AR(ER) 11:D=0.5-7 mm AR(ER) 16:D=0.5-10 mm AR(ER) 20:D=0.5-13 mm AR(ER) 25:D=0.5-16 mm AR(ER) 32:D=2.0-20.0 mm AR(ER) 40:D=3.5-26 mm AR(ER) 50:D=5.0-34 mm