The Powermatic 1791096 is a 4-Piece Premium Mortise Chisel & Bit Set. These premium hollow chisel and bit sets are machined from solid bars of the finest carbon steel. They have one cutting edge, one spur and a brad point for superior performance, making consistently clean and truly square cuts Features: Ground and hardened carbon steel for efficient performance and long life Extra long bits for compatibility with different mortisers Makes consistently clean cuts with smooth side walls What's In the Box: Powermatic 1791096 Premium Mortise Chisel & Bit Set 4-Piece 1/4-Inch Bit 5/16-Inch Bit 3/8-Inch Bit 1/2-Inch Bit