Jacobs Drill Chuck 5mm 20mm 36B Heavy Duty Thread Mount 3/4-16 K4 Key JCM6316

  

Threaded Mounting Size 3/4 In. This drill chuck is designed for heavy- and medium-duty applications using portable, bench, or floor-mounted power tools. The chuck jaws are center ground for absolute straightness and alignment. The through-hardened sleeve teeth and hardened chuck nose provide superior wear resistance.