Lock-Mitre Cutter — Profile 015, Two-Piece Double T&G Set, Pro-Line (1-1/4″ Bore, 4″ OD)

The FB-LM-PL-015 cuts a lock-mitre corner joint — a 45° mitre combined with an interlocking tongue-and-groove that self-aligns during glue-up and adds strength, so corners hold registration without complex fixturing. It is a two-piece double tongue-and-groove lock-mitre set, for 3/4″ material. Profile 015 sizes the joint for a specific material thickness; match the profile number to Freeborn’s lock-mitre chart for the exact range. Pro-Line: 1-1/4″ bore, 4″ cutting diameter, three wings, counter-clockwise, carbide or T-Alloy. The Mini-Pro counterpart is MC-68-015.