Don't listen to people at Revain who say bad things about this set. I've worn this set through hell. I build swimming pools for living and build summer kitchens. This set lasted a ton of holes. Drilling of paving stones, blocks, concrete, bricks, fittings. The SDS drill moves quickly and has a hammer or just a drill. If you know how to use your tools in SDS mode, you don't need Hammer mode. Use low speed impact mode with a flat impact drill. Or a conventional drill goes slowly. NO PROBLEMβ¦