Sandvik Coromant 8271308 Collet Chucks; Collet System: ER; Collet Series: ER20; Shank Type: Modular Connection; Projection (Decimal Inch - 4 Decimals): 88.5000; Projection (Inch): 3.4843; Through Coolant: Yes; Minimum Collet Capacity (mm): 20.00; Min