Lyndex-Nikken CAT40-SK6-120U- Collet Chucks; Collet System: Slim Chuck ; Collet Series: SK6 ; Taper Size: CAT40 ; Projection (Decimal Inch): 4.7200in ; Minimum Collet Capacity (Decimal Inch): 0.0280in ; Maximum Collet Capacity (Decimal Inch): 0.2500i