The dewalt d25302dh cordless dust extraction system is ideal for dust free drilling up to 16mm in diameter with any dewalt 28v or 36v sds plus hammer it is powered by an independent motor maintaining maximum hammer performance with no decrease in durability the high quality washable hepa filter capable of achieving 995 efficiency with dust particles as small as 03 microns and it has a quick fit system for easy tool free assembly and release it is extremely tough and versatile to meet the needs o