For use with compatible models of DeWalt 18v SDS hammer drill, this cordlessly powered, integrated dust extraction unit is designed to gather airborne particles from wood or drywall material as they are released by the drill's action. Not only will using the D25303DH protect your tool's internal components against damage from dust ingress, but it will also help to maintain a safe & healthy working environment. A High Efficiency Particulate Arrestance (HEPA) filter is washable to allow for reuse and will effectively prevent particles as small as 0.3 microns from being released into the local atmosphere. Compatibility The following DeWalt models: DCH273, DCH274, DCH253 (Type 2 Only) & DCH254 (Type 2 Only) Features & Benefits Enables dust free working when drilling up to 16 mm in diameter Powered by an independent motor, designed to prevent any deleterious effect on the hammer drill's performance A cost saver in the long term increases the service life of your tool by protecting it against dust ingress Fitted with a high-quality washable HEPA filter, capable of achieving 99.5% efficiency with dust particles as small as 0.3 microns Quick release for easy tool free attachment & detachment Extremely tough & versatile: will meet the needs of the most demanding applications Compact design & low weight offer excellent comfort & near perfect balance Maximum extraction always maintained regardless of the hammer speed The extractor continues to operate for two seconds after the hammer trigger is released, ensuring that any debris in the telescope or hose is completely removed Specifications Max. Drill Bit Diameter: 16mm Max. Drill Bit Length: 160mm Max. Drilling Depth: 125mm Weight 1.4kg.