The Bosch HS1911 1-inch x 12-inch Flat Chisel SDS-Max Rotary Hammer Bit is durable and ready for extreme performance. The Bosch HS1911 uses an SDS-Max shank to ensure tight grip for the toughest jobs. Features: Use for breaking away concrete in tight areas where hammers and chisels will not fit Flat chisel head is great for breaking clay and slab concrete Will fit hammers using TE-Y and TE-FY shanks What's In the Box: Bosch HS1911 1-inch x 12-inch Flat Chisel SDS-Max Rotary Hammer Bit