GuildCraft 98-004C 4-Piece Mortise Chisel and Bit Set Chisel and Bit set made of steel 48 Rockwell Hardness to ensure strength and durability Parts fit all major bench top mortisers including Fisch, Delta, Jet, and Powermatic Chisel and bits in a protective canvas tool roll Contains 1/4-, 5/16-, 3/8-, and 1/2-inch mortise chisel & bits Honed finish