The CMT 855.505.11 Lock Miter Set by CMT is a two-bit router bit set engineered to produce precise 22.5 deg. lock miter joints for octagonal boxes, corner cabinetry, kitchen islands, entertainment centers, and corner hutches. Working in tandem, this matched pair of carbide-tipped bits creates interlocking joints that are mechanically strong and visually tight - even at 45 deg. corner angles - making complex joinery achievable on a router table without complicated clamping setups. Once machined, the joints can be glued and assembled or simply held with strapping tape, streamlining your workflow from cutting to final assembly.

Key Features

• 22.5 deg. lock miter geometry - produces interlocking corner joints at 45 deg. angles for octagonal constructions and corner cabinetry, giving you a strong mechanical fit before any glue is applied.
• Matched 2-bit set - both bits are paired and calibrated to work together, so you get consistent, repeatable joints without re-configuring your setup between mating pieces.
• HW (carbide) cutting material - hard-wearing carbide tips maintain a sharp cutting edge longer than high-speed steel, reducing the frequency of sharpening or bit replacement during production runs.
• 1/2 in. shank - the larger shank diameter provides greater rigidity and reduced vibration compared to smaller shanks, resulting in cleaner cuts and improved surface finish on joint faces.
• Compatible material thickness of 3/8 in. to 3/4 in. - accommodates a practical range of stock thicknesses commonly used in cabinet and box construction, giving you flexibility across multiple project types.
• Right-hand (RH) rotation - designed for standard router table and handheld router use, compatible with the vast majority of routers on the market without any special setup.
• 2-3/8 in. total length - the overall tool length provides adequate clearance above the collet when set up in a router table, making height adjustment straightforward.

Why This Product

• Building octagonal boxes or multi-sided corner cabinets requires precise angled joints - this set is specifically designed for 22.5 deg. lock miter joinery, meaning the geometry is built into the bit rather than relying on operator setup for the angle.
• The interlocking lock miter profile self-aligns mating panels during assembly, reducing the need for complex clamping rigs - joints can be held securely with simple strapping tape while glue cures.
• With a maximum material thickness range of 3/8 in. to 3/4 in., this set covers the most common panel and solid wood thicknesses used in kitchen cabinetry, corner hutches, and entertainment center construction.
• The 1/2 in. shank and carbide cutting material work together to support smooth, consistent performance across solid hardwood and other demanding materials, making this set a practical choice for both production shops and dedicated hobbyists.

Specifications

• Manufacturer Part Number: 855.505.11
• Brand: CMT Orange Tools
• Angle: 22.5 deg.
• Diameter: 1-15/32 in.
• Cutting Height: 7/8 in.
• Total Length: 2-3/8 in.
• Shank: 1/2 in.
• Maximum Material Thickness: 3/8 in. - 3/4 in.
• Number of Teeth: 2
• Cutting Material: HW (Carbide)
• Rotation: Right-hand (RH)

Approved Applications

• Octagonal box construction
• Corner cabinetry for kitchens and kitchen islands
• Entertainment center construction
• Corner hutch joinery
• 45 deg. lock miter corner joints

What's Included

• 2x lock miter router bits (matched set) - 1-15/32 in. diameter, 22.5 deg., 1/2 in. shank