Home Depot offers the Makita Dust Extractor Attachment for $45.15. That's a $115 low.
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Features HEPA filter captures 99.97% of dust particles as small as 0.3 microns Meets OSHA Table 1 compliance standards Allows drilling up to 7-1/2" deep and up to 1-3/16" diameter holes Depth-stop adjustment button for accurate drilling depth