The drill bit spins round, the hole tears out, and the tenon still won't fit.
Working with mortise and tenon joints by hand means hours of chiselling, filing and sanding just to get a square opening that actually fits. Chuck one of these carbon steel bits into your standard drill and you get a clean, precise square hole in a single pass — no chiselling, no sanding, no rework needed. The CNC-machined cutting edges bite cleanly through softwoods and hardwoods alike, leaving a crisp opening that the tenon drops straight into.
Benefits
- No more torn-out, ragged holes: Every bore comes out clean and dimensionally accurate from the very first pass, so you never have to reach for sandpaper or a chisel to make the joint fit.
- Hours of hand-finishing disappear: What used to take a mallet, chisel and file is done in seconds, freeing you to focus on the joinery itself rather than correcting the opening.
- No more wondering whether the bit will hold up in hardwood: The carbon steel construction stays sharp across pine and oak without you having to slow down, check the edge or swap bits mid-project.
Specifications
- Material: High-grade carbon steel
- Surface finish: CNC-machined
- Available sizes: 6.4 mm, 8 mm, 9.5 mm, 12.7 mm, 14 mm, 16 mm, 19 mm
- Colour: Steel grey
- Compatibility: All standard drills and hammer drills
- Suitable woods: All timber types from pine to oak
- Contents: 4-bit set, 6-bit set, or adapter holder (depending on variant)
How to Use
- Chuck: Insert the chosen bit into your standard drill chuck — no specialist chuck required.
- Drill: Position the bit on your marked point and feed it into the wood with steady, even pressure.
- Remove: Withdraw the bit — the square hole is clean and ready to use immediately.
Pro Tip: When drilling hardwood such as oak, reduce your drill speed to a medium setting — the cutting edge stays sharper for longer and the hole comes out noticeably cleaner.