The 5319-DE Dry Coring Dust Extraction Attachment allows users to be OSHA compliant when drilling with larger diameter rotary hammer bits or core bits. The attachment works with the Milwaukee 8-Gallon Dust Extractor (8960-20) to eliminate dust when drilling or dry coring with bits up to 6" in diameter. The vacuum suction allows the attachment to stick to the wall or ground for easy and accurate drilling/coring. Dry Coring Dust Extraction Attachment