Dual air chambers provide for both dust collection during use and provide suction to the wall Dust port fits Bosch 1-3/8-Inch vacuum nozzle and can convert to 1-1/4-Inch / 2-Inch hose nozzles Rubber seal maintains suction to wall Optimized for drilling diameters from 1-1/2-Inches to 5-Inches but can accommodate up to 6-Inches if the brush ring is removed International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions., Weight: 1.1 Pounds, Manufacturer: Bosch