Description:9Pcs Drill Bit Double SDS Plus Slot Electric Hammer Drill Bits Set 110mm Metal HSS Drill Set For Electric Drills CuttingSpecifications:Product NameElectric Hammer Drill Bits SetMaterial40CrCarbide HardnessHRC89.5-90.5Drill Body HardenssHRC45 to HRC48ShankSDS PLUSFluteDouble Flutes S4Diam..