Bosch HS1911 SDS-max&reg; Hammer Steel 12-in Flat Chisel For concrete removal and hard surface break-up Fits Bosch SDS-max hammers, competitive SDS-max driver hammers and Hilti hammers using TE-Y and TE-FY shanks (sold separately) 1 In. chisel width and 12 In. long SDS-max shank One-piece design