Wood Drill Bit Set for Square Holes

The drill hole becomes round and frayed – and the tenon simply doesn't fit.

Anyone who has to rework tenon joints by hand loses time and patience. With this precision wood drill set, you get clean square holes in a single drilling pass – no chiseling, no sanding, no rework. The result fits immediately with millimeter precision, whether you're working with pine or oak.

Advantages

• No more frayed drill holes: Instead of reworking and sanding, you get clean, precisely sized results immediately – right from the first drilling pass.
• Hours of manual labor eliminated: What used to require chisels and files is done by the set in seconds – and the result fits perfectly right away.
• No doubts about stability or fit: The carbon steel construction stays permanently sharp, so you don’t have to wonder if the drill bit will give way on hard woods.

Specifications

• Material: High-quality carbon steel
• Surface finish: CNC milled
• Available sizes: 6.4 mm, 8 mm, 9.5 mm, 12.7 mm, 14 mm, 16 mm, 19 mm
• Color: Stainless steel gray
• Compatibility: All standard drills and hammer drills
• Use: All wood types from pine to oak
• Delivery contents: 4 or 6 drill bits or adapter holder (depending on variant)

Application

1. Clamping: Clamp the desired drill bit into the standard drill – no special chuck needed.
2. Drilling: Position the drill bit at the marked spot and guide it into the wood with steady pressure.
3. Removing: Pull out the drill bit – the square hole sits cleanly and is ready for immediate use.

Pro tip: For hardwoods like oak, reduce the drill speed to medium – this keeps the cutting edge sharper longer and produces an even cleaner hole.