Rohm 767688 Type 102-60 Extra 10 Plastic Single Sleeve Keyless Drill Chuck with Through-Hole, 1/2"-20 NC Thread, 42.7mm Diameter, 1-10mm Clamping Capacity $53.60 B00DD7J512
Röhm 502847 Top Grip BZI Clamping Head Collet GTG65-Round, Smooth-D2-1/2, 58 mm long $295.00 B00JGI62AE