Bosch Drill Bit HCD2041 SDS Plus Speed Clean 1/4 x 9 Inch Hollow Concrete Masonry (Hollow Extraction Core 4.25 In Usable Adhesive Anchor Boring) Drill Bit Set Adjustable shield enhances safety and

Bosch Drill Bit HCD2041 SDS Plus Speed Clean 1 4 x 9 Inch Hollow Concrete Masonry (Hollow Extraction Core 4.25 In Usable Adhesive Anchor Boring) Drill Bit Set Adjustable shield enhances safety and Adjustable shield enhances safety and debris control featuring a 1 2 inch all metal ratcheting chuck that ensures superior bit retention during high vibration hammer applications OSHA Table 1 Compliant Concrete Drilling: Capturing 90% of airborne respirable crystalline silica dust directly at the point of impact when connected to a HEPA vacuum extractor 6 mm) Shank System Interface SDS Plus® Keyless System Cutter Head Architecture Solid Carbide Tipped 2 Cutter Head Flute Engineering Design Spiral with Internal Extraction Core Dust Collection Mechanism Hollow Extraction Core via Vacuum Adapter Body Construction Material One Piece Milled Industrial Steel Body Net Bare Tool Weight 0