Bit Holder for DCD850 DCD999 Drill Driver Part Number N851797. Model:For DCD850 DCD999. Bit Holder Screw for DCD999, DCD999NT, DCD999T1, DCD999X1, DCF850D2T, DCF850E1T, DCF85，DCD800. This essential accessory fits for Drills, Drivers and Wrenches.
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