Dewalt D25892K 22 Lb. Sds Max Demolition HammerDewalt D25892K Features Demolition and concrete contractors will use these dedicated chipping hammers to remove over poured concrete once forms are taken off. User needs to create a hole in a concrete wall, so they will score the concrete then break away all concrete inside the scored edges. User needs to install pipework or wiring underground after the slab is poured. They will score the section needing demoltion, then chip away the concrete inside