Lyndex-Nikken NBT30-SK6C-60P Collet Chucks; Collet System: Slim Chuck ; Collet Series: SK6 ; Taper Size: NBT30 ; Projection (Decimal Inch): 2.3600in ; Minimum Collet Capacity (Decimal Inch): 0.0280in ; Maximum Collet Capacity (Decimal Inch): 0.2500in