This combination set of sds drills and chisels is the ideal set for anyone who has a 3 mode sds drill the drill bits will fit in any sds drill and the chisels will work on machines with the chisel only mode sds drills are extremely common now the difference between the sds drill system and a normal drill is the chuck this is designed to receive drill bits and chisels with the grooved and fluted shanks these click into the chuck to create a much stronger grip than a traditional style chuck th