Lyndex-Nikken NBT40-SK16C-90 Collet Chucks; Collet System: Slim Chuck ; Collet Series: SK16 ; Taper Size: NBT40 ; Projection (Decimal Inch): 3.5400in ; Minimum Collet Capacity (Decimal Inch): 0.1080in ; Maximum Collet Capacity (Decimal Inch): 0.6300i