CMT Mortising Chisel and Bit - 1/4" Diameter, 3/4" Shank, Right-Hand Rotation by CMT is a high-speed steel hollow chisel and bit set designed for cutting clean, square mortise holes in solid wood. Built for use with standard drill press mortising attachments and dedicated mortising machines, this set gives woodworkers a reliable, time-tested path to crafting traditional mortise-and-tenon joints with confidence. Whether you are building furniture, constructing door frames, or tackling precision joinery work, having the right chisel-and-bit combination at the correct size makes all the difference in fit, finish, and long-term joint strength.

Key Features

• 1/4" chisel and bit diameter - produces a precise 1/4" square mortise hole in a single pass, ideal for smaller mortise-and-tenon joints found in fine furniture and cabinet construction.
• High-speed steel (HSS) construction - HSS maintains a sharp cutting edge through repeated use in hardwood and softwood, reducing the frequency of resharpening and keeping your workflow uninterrupted.
• 3/4" shank - fits the standard 3/4" chuck found on most drill press mortising attachments and benchtop mortising machines, making this a drop-in-ready tool for common workshop setups.
• Right-hand (RH) rotation - designed for conventional right-hand rotation drill presses and mortising machines, so it pairs correctly with standard equipment without any special adaptation.
• Single-flute bit (1 tooth) - the single-tooth configuration paired with the hollow chisel efficiently clears waste material from the mortise pocket, helping maintain clean walls and accurate dimensions.
• Compatible with standard mortising attachments and machines - works with any drill press mortising attachment or dedicated mortising machine, giving this set broad compatibility across common workshop configurations.

Why This Product

• The mortise-and-tenon joint is widely recognized as one of the strongest and most accurate woodworking joints available - this chisel and bit set gives you a purpose-built tool to cut it cleanly and consistently at the 1/4" size.
• HSS material delivers durable cutting performance in both hardwood and softwood without the brittleness concerns of some alternative tool steels, making this set a practical choice for production joinery as well as one-off furniture builds.
• The 3/4" shank and right-hand rotation specification mean this set is ready to use with most standard drill press mortising attachments straight out of the package - no adapter or special setup required.
• A dedicated chisel-and-bit set at the 1/4" size fills a specific need in furniture making, door and window frame construction, and cabinetry where smaller mortise dimensions are required for proportional joinery.

Specifications

• Manufacturer Part Number: 543.064.51
• Brand: CMT Orange Tools
• Diameter: 1/4"
• Shank: 3/4"
• Rotation: RH (Right-Hand)
• Number of Teeth: 1
• Material: HSS (High-Speed Steel)

Approved Applications

• Cutting square mortise holes in solid hardwood and softwood
• Traditional mortise-and-tenon joinery
• Furniture making and cabinet construction
• Door and window frame construction
• Use with drill press mortising attachments
• Use with benchtop and floor-standing dedicated mortising machines