Lyndex-Nikken CAT50-SK10-165U Collet Chucks; Collet System: Slim Chuck ; Collet Series: SK10 ; Taper Size: CAT50 ; Projection (Decimal Inch): 6.5000in ; Minimum Collet Capacity (Decimal Inch): 0.0350in ; Maximum Collet Capacity (Decimal Inch): 0.3940